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/debug/test-error-handler-enhancements.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+require_once __DIR__ . '/../../vendor/autoload.php';
+
+use App\Framework\Queue\Exceptions\JobNotFoundException;
+use App\Framework\Queue\ValueObjects\JobId;
+use App\Framework\ErrorHandling\ErrorHandler;
+use App\Framework\DI\DefaultContainer;
+use App\Framework\Http\ResponseEmitter;
+use App\Framework\Http\RequestIdGenerator;
+
+echo "=== Testing ErrorHandler Enhancements ===\n\n";
+
+// Create minimal container for ErrorHandler
+$container = new DefaultContainer();
+$emitter = new ResponseEmitter();
+$requestIdGenerator = new RequestIdGenerator();
+
+$errorHandler = new ErrorHandler(
+    $emitter,
+    $container,
+    $requestIdGenerator,
+    null,
+    true // Debug mode to see recovery hints
+);
+
+// Test 1: Create a JobNotFoundException (uses QUEUE007 error code)
+echo "Test 1: JobNotFoundException with ErrorCode integration\n";
+echo str_repeat('-', 60) . "\n";
+
+try {
+    $jobId = JobId::fromString('test-job-123');
+    throw JobNotFoundException::byId($jobId);
+} catch (JobNotFoundException $e) {
+    echo "Exception: " . get_class($e) . "\n";
+    echo "Message: " . $e->getMessage() . "\n";
+    echo "Error Code: " . $e->getErrorCode()->getValue() . "\n";
+    echo "Category: " . $e->getErrorCode()->getCategory() . "\n";
+    echo "Severity: " . $e->getErrorCode()->getSeverity()->value . "\n";
+    echo "Is Recoverable: " . ($e->getErrorCode()->isRecoverable() ? 'Yes' : 'No') . "\n";
+    echo "Recovery Hint: " . $e->getErrorCode()->getRecoveryHint() . "\n";
+
+    // Test ErrorHandler metadata creation
+    echo "\nTesting ErrorHandler metadata generation...\n";
+    $response = $errorHandler->createHttpResponse($e);
+
+    echo "HTTP Status Code would be: " . $response->status->value . "\n";
+    echo "Response created successfully!\n";
+}
+
+echo "\n" . str_repeat('=', 60) . "\n\n";
+
+// Test 2: Test with different error code that has Retry-After
+echo "Test 2: Testing with error code that has Retry-After\n";
+echo str_repeat('-', 60) . "\n";
+
+use App\Framework\Queue\Exceptions\ChainNotFoundException;
+
+try {
+    throw ChainNotFoundException::byId('chain-123');
+} catch (ChainNotFoundException $e) {
+    echo "Exception: " . get_class($e) . "\n";
+    echo "Error Code: " . $e->getErrorCode()->getValue() . "\n";
+    echo "Retry After: " . ($e->getErrorCode()->getRetryAfterSeconds() ?? 'null') . " seconds\n";
+
+    $response = $errorHandler->createHttpResponse($e);
+    echo "HTTP Status Code: " . $response->status->value . "\n";
+    echo "Response headers would include Retry-After if applicable\n";
+}
+
+echo "\n✅ All ErrorHandler enhancement tests completed!\n";