feat(Production): Complete production deployment infrastructure

- Add comprehensive health check system with multiple endpoints
- Add Prometheus metrics endpoint
- Add production logging configurations (5 strategies)
- Add complete deployment documentation suite:
  * QUICKSTART.md - 30-minute deployment guide
  * DEPLOYMENT_CHECKLIST.md - Printable verification checklist
  * DEPLOYMENT_WORKFLOW.md - Complete deployment lifecycle
  * PRODUCTION_DEPLOYMENT.md - Comprehensive technical reference
  * production-logging.md - Logging configuration guide
  * ANSIBLE_DEPLOYMENT.md - Infrastructure as Code automation
  * README.md - Navigation hub
  * DEPLOYMENT_SUMMARY.md - Executive summary
- Add deployment scripts and automation
- Add DEPLOYMENT_PLAN.md - Concrete plan for immediate deployment
- Update README with production-ready features

All production infrastructure is now complete and ready for deployment.

tests/Unit/Framework/Logging/Handlers/FileHandlerTest.php

@@ -0,0 +1,413 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Framework\Logging\Handlers\FileHandler;
+use App\Framework\Logging\LogLevel;
+use App\Framework\Logging\LogRecord;
+use App\Framework\Logging\ValueObjects\LogContext;
+
+describe('FileHandler', function () {
+    beforeEach(function () {
+        // Create test directory
+        $this->testDir = sys_get_temp_dir() . '/logger_test_' . uniqid();
+        mkdir($this->testDir, 0777, true);
+
+        $this->testLogFile = $this->testDir . '/test.log';
+    });
+
+    afterEach(function () {
+        // Clean up test files
+        if (file_exists($this->testLogFile)) {
+            unlink($this->testLogFile);
+        }
+        if (is_dir($this->testDir)) {
+            rmdir($this->testDir);
+        }
+    });
+
+    describe('constructor', function () {
+        it('creates log file directory if it does not exist', function () {
+            $logFile = $this->testDir . '/nested/dir/test.log';
+            $handler = new FileHandler($logFile);
+
+            expect(is_dir(dirname($logFile)))->toBeTrue();
+        });
+
+        it('accepts LogLevel enum as minLevel', function () {
+            $handler = new FileHandler($this->testLogFile, LogLevel::ERROR);
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::WARNING,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeFalse();
+        });
+
+        it('accepts int as minLevel', function () {
+            $handler = new FileHandler($this->testLogFile, 400); // ERROR level
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::WARNING,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeFalse();
+        });
+
+        it('defaults to DEBUG level when no minLevel specified', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::DEBUG,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeTrue();
+        });
+    });
+
+    describe('isHandling()', function () {
+        it('returns true when record level is above minLevel', function () {
+            $handler = new FileHandler($this->testLogFile, LogLevel::WARNING);
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::ERROR,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeTrue();
+        });
+
+        it('returns true when record level equals minLevel', function () {
+            $handler = new FileHandler($this->testLogFile, LogLevel::WARNING);
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::WARNING,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeTrue();
+        });
+
+        it('returns false when record level is below minLevel', function () {
+            $handler = new FileHandler($this->testLogFile, LogLevel::ERROR);
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::WARNING,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeFalse();
+        });
+    });
+
+    describe('handle()', function () {
+        it('writes log entry to file', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record = new LogRecord(
+                message: 'Test log message',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record);
+
+            expect(file_exists($this->testLogFile))->toBeTrue();
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('Test log message');
+        });
+
+        it('includes level name in output', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record = new LogRecord(
+                message: 'Test error',
+                context: LogContext::empty(),
+                level: LogLevel::ERROR,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('ERROR');
+        });
+
+        it('includes timestamp in output', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record = new LogRecord(
+                message: 'Test message',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            // Check that a timestamp pattern exists (e.g., 2024-10-20 or similar)
+            expect($content)->toMatch('/\d{4}-\d{2}-\d{2}/');
+        });
+
+        it('includes channel in output', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record = new LogRecord(
+                message: 'Test message',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'security'
+            );
+
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('[security]');
+        });
+
+        it('includes request_id when present in extras', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record = (new LogRecord(
+                message: 'Test message',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            ))->addExtra('request_id', 'req-123');
+
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('[req-123]');
+        });
+
+        it('appends to existing file', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $record1 = new LogRecord(
+                message: 'First message',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $record2 = new LogRecord(
+                message: 'Second message',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record1);
+            $handler->handle($record2);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('First message');
+            expect($content)->toContain('Second message');
+
+            // Check that we have two lines
+            $lines = explode(PHP_EOL, trim($content));
+            expect(count($lines))->toBe(2);
+        });
+
+        it('uses custom output format when specified', function () {
+            $handler = new FileHandler(
+                $this->testLogFile,
+                outputFormat: '{level_name}: {message}'
+            );
+
+            $record = new LogRecord(
+                message: 'Custom format test',
+                context: LogContext::empty(),
+                level: LogLevel::ERROR,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('ERROR: Custom format test');
+        });
+    });
+
+    describe('setMinLevel()', function () {
+        it('updates minimum level with LogLevel', function () {
+            $handler = new FileHandler($this->testLogFile, LogLevel::DEBUG);
+            $handler->setMinLevel(LogLevel::ERROR);
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::WARNING,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeFalse();
+        });
+
+        it('updates minimum level with int', function () {
+            $handler = new FileHandler($this->testLogFile, LogLevel::DEBUG);
+            $handler->setMinLevel(400); // ERROR
+
+            $record = new LogRecord(
+                message: 'test message',
+                context: LogContext::empty(),
+                level: LogLevel::WARNING,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeFalse();
+        });
+
+        it('returns self for fluent API', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $result = $handler->setMinLevel(LogLevel::ERROR);
+
+            expect($result)->toBe($handler);
+        });
+    });
+
+    describe('setOutputFormat()', function () {
+        it('updates output format', function () {
+            $handler = new FileHandler($this->testLogFile);
+            $handler->setOutputFormat('{level_name} - {message}');
+
+            $record = new LogRecord(
+                message: 'New format',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('INFO - New format');
+        });
+
+        it('returns self for fluent API', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $result = $handler->setOutputFormat('{message}');
+
+            expect($result)->toBe($handler);
+        });
+    });
+
+    describe('setLogFile()', function () {
+        it('updates log file path', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $newLogFile = $this->testDir . '/new-test.log';
+            $handler->setLogFile($newLogFile);
+
+            $record = new LogRecord(
+                message: 'New file test',
+                context: LogContext::empty(),
+                level: LogLevel::INFO,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            $handler->handle($record);
+
+            expect(file_exists($newLogFile))->toBeTrue();
+            $content = file_get_contents($newLogFile);
+            expect($content)->toContain('New file test');
+
+            // Cleanup
+            if (file_exists($newLogFile)) {
+                unlink($newLogFile);
+            }
+        });
+
+        it('creates directory for new log file', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $newLogFile = $this->testDir . '/nested/new/test.log';
+            $handler->setLogFile($newLogFile);
+
+            expect(is_dir(dirname($newLogFile)))->toBeTrue();
+
+            // Cleanup
+            if (file_exists($newLogFile)) {
+                unlink($newLogFile);
+            }
+            // Clean directories from deepest to shallowest
+            if (is_dir($this->testDir . '/nested/new')) {
+                rmdir($this->testDir . '/nested/new');
+            }
+            if (is_dir($this->testDir . '/nested')) {
+                rmdir($this->testDir . '/nested');
+            }
+        });
+
+        it('returns self for fluent API', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $result = $handler->setLogFile($this->testDir . '/other.log');
+
+            expect($result)->toBe($handler);
+        });
+    });
+
+    describe('fluent interface', function () {
+        it('supports chaining methods', function () {
+            $handler = new FileHandler($this->testLogFile);
+
+            $handler
+                ->setMinLevel(LogLevel::WARNING)
+                ->setOutputFormat('{level_name}: {message}')
+                ->setLogFile($this->testLogFile);
+
+            $record = new LogRecord(
+                message: 'Chained config',
+                context: LogContext::empty(),
+                level: LogLevel::ERROR,
+                timestamp: new DateTimeImmutable(),
+                channel: 'test'
+            );
+
+            expect($handler->isHandling($record))->toBeTrue();
+            $handler->handle($record);
+
+            $content = file_get_contents($this->testLogFile);
+            expect($content)->toContain('ERROR: Chained config');
+        });
+    });
+});