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/Metrics/Metric.php

@@ -73,8 +73,12 @@ final readonly class Metric
             return '';
         }
 
+        // Sort labels alphabetically for Prometheus format consistency
+        $sortedLabels = $this->labels;
+        ksort($sortedLabels);
+
         $parts = [];
-        foreach ($this->labels as $key => $value) {
+        foreach ($sortedLabels as $key => $value) {
             // Escape special characters in label values
             $escapedValue = str_replace(['\\', '"', "\n"], ['\\\\', '\\"', '\\n'], $value);
             $parts[] = sprintf('%s="%s"', $key, $escapedValue);