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/ResilientLogHandlerTest.php

@@ -0,0 +1,113 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Framework\Logging;
+
+use App\Framework\CircuitBreaker\CircuitBreaker;
+use App\Framework\CircuitBreaker\CircuitBreakerConfig;
+use App\Framework\Logging\Handlers\ResilientLogHandler;
+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 ResilientLogHandlerTest extends TestCase
+{
+    public function test_uses_primary_handler_when_healthy(): void
+    {
+        $primary = $this->createMock(LogHandler::class);
+        $fallback = $this->createMock(LogHandler::class);
+
+        $record = $this->createLogRecord();
+
+        $primary->expects($this->once())
+            ->method('handle')
+            ->with($record);
+
+        $fallback->expects($this->never())
+            ->method('handle');
+
+        $handler = new ResilientLogHandler($primary, $fallback);
+        $handler->handle($record);
+    }
+
+    public function test_uses_fallback_when_primary_fails(): void
+    {
+        $primary = $this->createMock(LogHandler::class);
+        $fallback = $this->createMock(LogHandler::class);
+
+        $record = $this->createLogRecord();
+
+        $primary->method('handle')
+            ->willThrowException(new \RuntimeException('Primary failed'));
+
+        $fallback->expects($this->atLeastOnce())
+            ->method('handle');
+
+        $handler = new ResilientLogHandler($primary, $fallback);
+        $handler->handle($record);
+
+        // Should not throw exception
+        $this->assertTrue(true);
+    }
+
+    public function test_never_throws_exception(): void
+    {
+        $primary = $this->createMock(LogHandler::class);
+        $fallback = $this->createMock(LogHandler::class);
+
+        $primary->method('handle')
+            ->willThrowException(new \RuntimeException('Primary failed'));
+
+        $fallback->method('handle')
+            ->willThrowException(new \RuntimeException('Fallback failed'));
+
+        $handler = new ResilientLogHandler($primary, $fallback);
+
+        // Should never throw - uses error_log as last resort
+        $handler->handle($this->createLogRecord());
+
+        $this->assertTrue(true);
+    }
+
+    public function test_circuit_breaker_opens_after_failures(): void
+    {
+        $primary = $this->createMock(LogHandler::class);
+        $fallback = $this->createMock(LogHandler::class);
+
+        $circuitBreaker = new CircuitBreaker(
+            new CircuitBreakerConfig(
+                name: 'test',
+                failureThreshold: 3,
+                successThreshold: 1,
+                timeout: 60.0
+            )
+        );
+
+        $primary->method('handle')
+            ->willThrowException(new \RuntimeException('Failed'));
+
+        $handler = new ResilientLogHandler($primary, $fallback, $circuitBreaker);
+
+        // Trigger failures to open circuit
+        for ($i = 0; $i < 5; $i++) {
+            $handler->handle($this->createLogRecord());
+        }
+
+        $this->assertTrue($circuitBreaker->isOpen());
+        $this->assertFalse($handler->isHealthy());
+    }
+
+    private function createLogRecord(string $message = 'test'): LogRecord
+    {
+        return new LogRecord(
+            level: LogLevel::INFO,
+            message: $message,
+            channel: 'test',
+            context: LogContext::empty(),
+            timestamp: new \DateTimeImmutable()
+        );
+    }
+}