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/Http/ServerEnvironment.php

@@ -4,6 +4,8 @@ declare(strict_types=1);
 
 namespace App\Framework\Http;
 
+use App\Framework\Http\Url\Url;
+use App\Framework\Http\Url\UrlFactory;
 use App\Framework\UserAgent\UserAgent;
 
 /**
@@ -62,11 +64,11 @@ final readonly class ServerEnvironment
         return (int) $this->get(ServerKey::SERVER_PORT, 80);
     }
 
-    public function getRequestUri(): Uri
+    public function getRequestUri(): Url
     {
         $uriString = $this->get(ServerKey::REQUEST_URI, '/');
 
-        return new Uri($uriString);
+        return UrlFactory::parse($uriString);
     }
 
     public function getScriptName(): string
@@ -147,11 +149,11 @@ final readonly class ServerEnvironment
         return $this->get(ServerKey::HTTP_REFERER, '');
     }
 
-    public function getRefererUri(): Uri
+    public function getRefererUri(): Url
     {
         $referer = $this->getReferer();
 
-        return new Uri($referer);
+        return UrlFactory::parse($referer);
     }
 
     /**
@@ -198,4 +200,28 @@ final readonly class ServerEnvironment
 
         return $referer;
     }
+
+    /**
+     * Get WebSocket key for WebSocket handshake
+     */
+    public function getWebSocketKey(): ?string
+    {
+        return $this->get(ServerKey::HTTP_SEC_WEBSOCKET_KEY);
+    }
+
+    /**
+     * Check if request is XMLHttpRequest (AJAX)
+     */
+    public function isXmlHttpRequest(): bool
+    {
+        return $this->get(ServerKey::HTTP_X_REQUESTED_WITH) === 'XMLHttpRequest';
+    }
+
+    /**
+     * Check if request has SPA header
+     */
+    public function isSpaRequest(): bool
+    {
+        return $this->has(ServerKey::HTTP_X_SPA_REQUEST);
+    }
 }