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/BufferedLogHandlerTest.php

@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Framework\Logging;
+
+use App\Framework\Logging\Handlers\BufferedLogHandler;
+use App\Framework\Logging\LogHandler;
+use App\Framework\Logging\LogLevel;
+use App\Framework\Logging\LogRecord;
+use App\Framework\Logging\ValueObjects\LogContext;
+use PHPUnit\Framework\TestCase;
+
+final class BufferedLogHandlerTest extends TestCase
+{
+    public function test_buffers_logs_until_size_reached(): void
+    {
+        $inner = $this->createMock(LogHandler::class);
+        $handler = new BufferedLogHandler($inner, bufferSize: 3);
+
+        // First 2 logs should be buffered
+        $inner->expects($this->never())->method('handle');
+
+        $handler->handle($this->createLogRecord('log 1'));
+        $handler->handle($this->createLogRecord('log 2'));
+
+        $this->assertEquals(2, $handler->getBufferSize());
+    }
+
+    public function test_flushes_when_buffer_full(): void
+    {
+        $inner = $this->createMock(LogHandler::class);
+        $handler = new BufferedLogHandler($inner, bufferSize: 2);
+
+        $inner->expects($this->exactly(2))->method('handle');
+
+        $handler->handle($this->createLogRecord('log 1'));
+        $handler->handle($this->createLogRecord('log 2'));
+
+        $this->assertEquals(0, $handler->getBufferSize());
+    }
+
+    public function test_flushes_immediately_on_error(): void
+    {
+        $inner = $this->createMock(LogHandler::class);
+        $handler = new BufferedLogHandler(
+            $inner,
+            bufferSize: 100,
+            flushOnError: true
+        );
+
+        // INFO log should be buffered
+        $handler->handle($this->createLogRecord('info', LogLevel::INFO));
+        $this->assertEquals(1, $handler->getBufferSize());
+
+        // ERROR should trigger immediate flush
+        $inner->expects($this->exactly(2))->method('handle');
+
+        $handler->handle($this->createLogRecord('error', LogLevel::ERROR));
+        $this->assertEquals(0, $handler->getBufferSize());
+    }
+
+    public function test_flushes_on_destruct(): void
+    {
+        $inner = $this->createMock(LogHandler::class);
+        $inner->expects($this->once())->method('handle');
+
+        $handler = new BufferedLogHandler($inner, bufferSize: 100);
+        $handler->handle($this->createLogRecord());
+
+        // Destructor should flush
+        unset($handler);
+    }
+
+    public function test_manual_flush(): void
+    {
+        $inner = $this->createMock(LogHandler::class);
+        $handler = new BufferedLogHandler($inner, bufferSize: 100);
+
+        $handler->handle($this->createLogRecord('log 1'));
+        $handler->handle($this->createLogRecord('log 2'));
+
+        $this->assertEquals(2, $handler->getBufferSize());
+
+        $inner->expects($this->exactly(2))->method('handle');
+        $handler->flush();
+
+        $this->assertTrue($handler->isEmpty());
+    }
+
+    private function createLogRecord(
+        string $message = 'test',
+        LogLevel $level = LogLevel::INFO
+    ): LogRecord {
+        return new LogRecord(
+            level: $level,
+            message: $message,
+            channel: 'test',
+            context: LogContext::empty(),
+            timestamp: new \DateTimeImmutable()
+        );
+    }
+}