Correction et enrichissement complet des scripts Gitea

- Corrections de bugs (14): grep portable, df robuste, rollback reel,
  retention intelligente, nettoyage cible, lock anti-concurrence, etc.
- Nouveaux fichiers: setup.sh (installateur tout-en-un), restore.sh
  (restauration standalone), gitea-scripts.conf (config unifiee)
- Features: backup distant (rsync/SCP), lock files, logrotate, dry-run,
  healthchecks Docker, notifications Telegram/ntfy.sh
- Documentation enrichie avec diagrammes d'architecture mermaid

docker-compose.yml

@@ -28,7 +28,14 @@ services:
       - "3000:3000"
       - "222:22"
     depends_on:
-      - gitea_db
+      gitea_db:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 30s
 
   gitea_db:
     image: mysql:8
@@ -43,3 +50,19 @@ services:
       - gitea
     volumes:
       - /DOCKER_CONFIG/gitea/mysql:/var/lib/mysql
+    healthcheck:
+      test:
+        [
+          "CMD",
+          "mysqladmin",
+          "ping",
+          "-h",
+          "localhost",
+          "-u",
+          "root",
+          "-p${MYSQL_ROOT_PASSWORD:-gitea}",
+        ]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 30s