feat(Deployment): Integrate Ansible deployment via PHP deployment pipeline

- Create AnsibleDeployStage using framework's Process module for secure command execution
- Integrate AnsibleDeployStage into DeploymentPipelineCommands for production deployments
- Add force_deploy flag support in Ansible playbook to override stale locks
- Use PHP deployment module as orchestrator (php console.php deploy:production)
- Fix ErrorAggregationInitializer to use Environment class instead of $_ENV superglobal

Architecture:
- BuildStage → AnsibleDeployStage → HealthCheckStage for production
- Process module provides timeout, error handling, and output capture
- Ansible playbook supports rollback via rollback-git-based.yml
- Zero-downtime deployments with health checks

.env.example

@@ -84,4 +84,24 @@ TIDAL_REDIRECT_URI=https://localhost/oauth/tidal/callback
 
 # Filesystem Performance (caching enabled by default)
 # Set to true only for debugging performance issues
-# FILESYSTEM_DISABLE_CACHE=false
+# FILESYSTEM_DISABLE_CACHE=false
+
+# ML Model Management Configuration (optional - defaults in MLConfig class)
+# ML_MONITORING_ENABLED=true
+# ML_DRIFT_THRESHOLD=0.15
+# ML_PERFORMANCE_WINDOW_HOURS=24
+# ML_AUTO_TUNING_ENABLED=false
+# ML_PREDICTION_CACHE_TTL=3600
+# ML_MODEL_CACHE_TTL=7200
+# ML_BASELINE_UPDATE_INTERVAL=86400
+# ML_MIN_PREDICTIONS_FOR_DRIFT=100
+# ML_CONFIDENCE_ALERT_THRESHOLD=0.65
+# ML_ACCURACY_ALERT_THRESHOLD=0.75
+
+# WhatsApp Business API Configuration
+# SECURITY: Replace with your actual WhatsApp Business API credentials
+# Get credentials from: https://business.facebook.com/settings/whatsapp-business-accounts
+WHATSAPP_ACCESS_TOKEN=your_whatsapp_access_token_here
+WHATSAPP_PHONE_NUMBER_ID=107051338692505
+WHATSAPP_BUSINESS_ACCOUNT_ID=your_business_account_id_here
+WHATSAPP_API_VERSION=v18.0