feat: homelab deployment - NPM + IONOS DNS + monitoring + NAS backup

- Restructured docker-compose for Nginx Proxy Manager (no custom nginx)
- Added domain wordly.art configuration
- Added Prometheus + Grafana monitoring stack with pre-configured dashboards
- Added PostgreSQL backup script to NAS (daily/weekly/monthly rotation)
- Added alert rules for backend, system, and Docker metrics
- Updated deployment guide for NPM + IONOS DNS homelab setup
- Added marketing plan document
- PDF translator and watermark support
- Enhanced middleware, routes, and translator modules

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker/prometheus/prometheus.yml

@@ -1,37 +1,34 @@
-# Prometheus Configuration for Document Translation API
+# Wordly.art - Prometheus Configuration
 
 global:
   scrape_interval: 15s
   evaluation_interval: 15s
   external_labels:
-    monitor: 'translate-api'
+    monitor: 'wordly-homelab'
+    environment: 'production'
 
-alerting:
-  alertmanagers:
-    - static_configs:
-        - targets: []
-
-rule_files: []
+rule_files:
+  - 'alerts.yml'
 
 scrape_configs:
-  # Backend API metrics
-  - job_name: 'translate-backend'
+  # Backend FastAPI
+  - job_name: 'wordly-backend'
     static_configs:
       - targets: ['backend:8000']
     metrics_path: /metrics
     scrape_interval: 10s
 
-  # Nginx metrics (requires nginx-prometheus-exporter)
-  - job_name: 'nginx'
-    static_configs:
-      - targets: ['nginx-exporter:9113']
-
-  # Node exporter for system metrics
+  # Systeme (CPU, RAM, Disk, Reseau)
   - job_name: 'node'
     static_configs:
       - targets: ['node-exporter:9100']
 
-  # Docker metrics
+  # Containers Docker
   - job_name: 'docker'
     static_configs:
       - targets: ['cadvisor:8080']
+
+  # Prometheus lui-meme
+  - job_name: 'prometheus'
+    static_configs:
+      - targets: ['localhost:9090']