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/Logging/PhpErrorLogInterceptor.php

@@ -121,11 +121,15 @@ final class PhpErrorLogInterceptor
     private function startWebMonitoring(): void
     {
         // Output buffer callback um am Ende der Request zu lesen
-        ob_start(function (string $buffer) {
+        $callback = function (string $buffer): string {
             $this->readAndForwardLogs();
 
             return $buffer;
-        });
+        };
+
+        \App\Framework\OutputBuffer\OutputBuffer::start(
+            \App\Framework\OutputBuffer\OutputBufferConfig::forWebMonitoring($callback)
+        );
     }
 
     /**