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.

src/Framework/Health/Checks/QueueHealthCheck.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Health\Checks;
+
+use App\Framework\Core\ValueObjects\Duration;
+use App\Framework\Health\HealthCheckCategory;
+use App\Framework\Health\HealthCheckInterface;
+use App\Framework\Health\HealthCheckResult;
+use App\Framework\Queue\Queue;
+
+final readonly class QueueHealthCheck implements HealthCheckInterface
+{
+    public function __construct(
+        private Queue $queue
+    ) {
+    }
+
+    public function check(): HealthCheckResult
+    {
+        $startTime = microtime(true);
+
+        try {
+            // Get queue statistics
+            $stats = $this->queue->getStats();
+            $responseTime = Duration::fromSeconds(microtime(true) - $startTime);
+
+            $queueSize = $stats['total_size'] ?? 0;
+            $failedJobs = $stats['failed_jobs'] ?? 0;
+
+            // Determine health based on queue metrics
+            $healthy = true;
+            $warnings = [];
+
+            // Warning if queue is getting large
+            if ($queueSize > 1000) {
+                $warnings[] = "Queue size is high ({$queueSize} jobs)";
+                $healthy = false;
+            }
+
+            // Warning if there are many failed jobs
+            if ($failedJobs > 100) {
+                $warnings[] = "High number of failed jobs ({$failedJobs})";
+                $healthy = false;
+            }
+
+            $data = [
+                'queue_size' => $queueSize,
+                'failed_jobs' => $failedJobs,
+                'response_time_ms' => $responseTime->toMilliseconds(),
+            ];
+
+            if (!empty($warnings)) {
+                return HealthCheckResult::warning(
+                    'Queue System',
+                    implode(', ', $warnings),
+                    $data,
+                    $responseTime->toMilliseconds()
+                );
+            }
+
+            return HealthCheckResult::healthy(
+                'Queue System',
+                $data,
+                $responseTime->toMilliseconds()
+            );
+
+        } catch (\Throwable $e) {
+            $responseTime = Duration::fromSeconds(microtime(true) - $startTime);
+
+            return HealthCheckResult::unhealthy(
+                'Queue System',
+                'Queue system failed: ' . $e->getMessage(),
+                [
+                    'error_type' => get_class($e),
+                ],
+                $responseTime->toMilliseconds(),
+                $e
+            );
+        }
+    }
+
+    public function getName(): string
+    {
+        return 'Queue System';
+    }
+
+    public function getCategory(): HealthCheckCategory
+    {
+        return HealthCheckCategory::INFRASTRUCTURE;
+    }
+
+    public function getTimeout(): int
+    {
+        return 3000; // 3 seconds
+    }
+}

src/Framework/Health/Checks/SslHealthCheck.php

@@ -0,0 +1,101 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Health\Checks;
+
+use App\Framework\Core\ValueObjects\Duration;
+use App\Framework\Deployment\Ssl\SslCertificateManager;
+use App\Framework\Health\HealthCheckCategory;
+use App\Framework\Health\HealthCheckInterface;
+use App\Framework\Health\HealthCheckResult;
+
+final readonly class SslHealthCheck implements HealthCheckInterface
+{
+    public function __construct(
+        private SslCertificateManager $sslManager
+    ) {
+    }
+
+    public function check(): HealthCheckResult
+    {
+        $startTime = microtime(true);
+
+        try {
+            $status = $this->sslManager->getCertificateStatus();
+            $responseTime = Duration::fromSeconds(microtime(true) - $startTime);
+
+            $data = [
+                'valid' => $status->isValid(),
+                'days_until_expiry' => $status->getDaysUntilExpiry(),
+                'issuer' => $status->getIssuer(),
+                'subject' => $status->getSubject(),
+                'response_time_ms' => $responseTime->toMilliseconds(),
+            ];
+
+            // Certificate expired or expiring soon
+            if (!$status->isValid()) {
+                return HealthCheckResult::unhealthy(
+                    'SSL Certificate',
+                    'Certificate is invalid or expired',
+                    $data,
+                    $responseTime->toMilliseconds()
+                );
+            }
+
+            // Warning if expiring within 7 days
+            if ($status->getDaysUntilExpiry() <= 7) {
+                return HealthCheckResult::warning(
+                    'SSL Certificate',
+                    "Certificate expiring in {$status->getDaysUntilExpiry()} days",
+                    $data,
+                    $responseTime->toMilliseconds()
+                );
+            }
+
+            // Warning if expiring within 30 days
+            if ($status->getDaysUntilExpiry() <= 30) {
+                return HealthCheckResult::warning(
+                    'SSL Certificate',
+                    "Certificate expiring in {$status->getDaysUntilExpiry()} days (renewal recommended)",
+                    $data,
+                    $responseTime->toMilliseconds()
+                );
+            }
+
+            return HealthCheckResult::healthy(
+                'SSL Certificate',
+                $data,
+                $responseTime->toMilliseconds()
+            );
+
+        } catch (\Throwable $e) {
+            $responseTime = Duration::fromSeconds(microtime(true) - $startTime);
+
+            return HealthCheckResult::unhealthy(
+                'SSL Certificate',
+                'SSL check failed: ' . $e->getMessage(),
+                [
+                    'error_type' => get_class($e),
+                ],
+                $responseTime->toMilliseconds(),
+                $e
+            );
+        }
+    }
+
+    public function getName(): string
+    {
+        return 'SSL Certificate';
+    }
+
+    public function getCategory(): HealthCheckCategory
+    {
+        return HealthCheckCategory::SECURITY;
+    }
+
+    public function getTimeout(): int
+    {
+        return 5000; // 5 seconds
+    }
+}

src/Framework/Health/Checks/VaultHealthCheck.php

@@ -0,0 +1,94 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Health\Checks;
+
+use App\Framework\Core\ValueObjects\Duration;
+use App\Framework\Health\HealthCheckCategory;
+use App\Framework\Health\HealthCheckInterface;
+use App\Framework\Health\HealthCheckResult;
+use App\Framework\Vault\Vault;
+use App\Framework\Vault\ValueObjects\SecretKey;
+
+final readonly class VaultHealthCheck implements HealthCheckInterface
+{
+    public function __construct(
+        private Vault $vault
+    ) {
+    }
+
+    public function check(): HealthCheckResult
+    {
+        $startTime = microtime(true);
+        $testKey = SecretKey::from('_health_check_test_' . time());
+
+        try {
+            // Test Vault connectivity and encryption/decryption
+            // Create test secret
+            $testValue = 'health_check_' . bin2hex(random_bytes(8));
+
+            // Store test secret
+            $this->vault->set($testKey, $testValue);
+
+            // Retrieve test secret
+            $retrievedValue = $this->vault->get($testKey);
+
+            // Delete test secret
+            $this->vault->delete($testKey);
+
+            $responseTime = Duration::fromSeconds(microtime(true) - $startTime);
+
+            // Verify value matches
+            if ($retrievedValue->reveal() === $testValue) {
+                return HealthCheckResult::healthy(
+                    'Vault',
+                    [
+                        'operations' => ['set', 'get', 'delete'],
+                        'encryption' => 'working',
+                        'response_time_ms' => $responseTime->toMilliseconds(),
+                    ],
+                    $responseTime->toMilliseconds()
+                );
+            }
+
+            return HealthCheckResult::warning(
+                'Vault',
+                'Encryption/decryption mismatch',
+                [
+                    'expected_length' => strlen($testValue),
+                    'actual_length' => strlen($retrievedValue->reveal()),
+                ],
+                $responseTime->toMilliseconds()
+            );
+
+        } catch (\Throwable $e) {
+            $responseTime = Duration::fromSeconds(microtime(true) - $startTime);
+
+            return HealthCheckResult::unhealthy(
+                'Vault',
+                'Vault system failed: ' . $e->getMessage(),
+                [
+                    'error_type' => get_class($e),
+                ],
+                $responseTime->toMilliseconds(),
+                $e
+            );
+        }
+    }
+
+    public function getName(): string
+    {
+        return 'Vault Secrets Management';
+    }
+
+    public function getCategory(): HealthCheckCategory
+    {
+        return HealthCheckCategory::SECURITY;
+    }
+
+    public function getTimeout(): int
+    {
+        return 5000; // 5 seconds
+    }
+}

src/Framework/Health/HealthCheckManagerInitializer.php

@@ -4,19 +4,15 @@ declare(strict_types=1);
 
 namespace App\Framework\Health;
 
-use App\Framework\Cache\Cache;
-use App\Framework\Database\DatabaseManager;
+use App\Framework\DI\Container;
 use App\Framework\DI\Initializer;
-use App\Framework\Health\Checks\CacheHealthCheck;
-use App\Framework\Health\Checks\DatabaseHealthCheck;
-use App\Framework\Health\Checks\DiskSpaceHealthCheck;
-use App\Framework\Health\Checks\SystemHealthCheck;
+use App\Framework\Discovery\UnifiedDiscoveryService;
 
 final readonly class HealthCheckManagerInitializer
 {
     public function __construct(
-        private DatabaseManager $databaseManager,
-        private Cache $cache
+        private UnifiedDiscoveryService $discoveryService,
+        private Container $container
     ) {
     }
 
@@ -25,22 +21,25 @@ final readonly class HealthCheckManagerInitializer
     {
         $manager = new HealthCheckManager();
 
-        // Register all health checks
-        $manager->registerHealthCheck(
-            new DatabaseHealthCheck($this->databaseManager)
+        // Automatically discover all classes implementing HealthCheckInterface
+        $healthCheckClasses = $this->discoveryService->findImplementations(
+            HealthCheckInterface::class
         );
 
-        $manager->registerHealthCheck(
-            new CacheHealthCheck($this->cache)
-        );
+        // Register each health check via dependency injection
+        foreach ($healthCheckClasses as $className) {
+            try {
+                // Use container to instantiate (handles dependencies automatically)
+                $healthCheck = $this->container->get($className);
 
-        $manager->registerHealthCheck(
-            new DiskSpaceHealthCheck()
-        );
-
-        $manager->registerHealthCheck(
-            new SystemHealthCheck()
-        );
+                if ($healthCheck instanceof HealthCheckInterface) {
+                    $manager->registerHealthCheck($healthCheck);
+                }
+            } catch (\Throwable $e) {
+                // Log error but continue with other health checks
+                error_log("Failed to register health check {$className}: " . $e->getMessage());
+            }
+        }
 
         return $manager;
     }