Align GrampsWeb setup with official docker-compose (STI-91)

Replace custom GrampsWeb config with the official setup:
- Use YAML anchor (&grampsweb / <<: *grampsweb) for DRY config
- Add all 8 official volumes: users, indexdir, thumbnail_cache, cache,
  secret, grampsdb, media, tmp
- Remove custom admin creation command (use GrampsWeb's built-in flow)
- Remove GRAMPSWEB_SECRET_KEY (managed by gramps_secret volume)
- Celery worker inherits full config via YAML merge
- Shared /tmp volume between web and celery for file transfers

Previous setup only had 2 volumes (data, cache), causing data loss
on container restart and GEDCOM import failures.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

compose.yml

@@ -188,73 +188,45 @@ services:
         wait $$OLLAMA_PID
       "
 
-  grampsweb:
+  grampsweb: &grampsweb
     image: ghcr.io/gramps-project/grampsweb:latest
     restart: unless-stopped
     ports:
       - "8090:5000"
     environment:
-      - GRAMPSWEB_SECRET_KEY=${GRAMPSWEB_SECRET_KEY:-dev-grampsweb-secret-key-not-for-production}
-      - GRAMPSWEB_ADMIN_EMAIL=${GRAMPSWEB_ADMIN_EMAIL:-admin@localhost}
-      - GRAMPSWEB_ADMIN_PASSWORD=${GRAMPSWEB_ADMIN_PASSWORD:-gramps_dev_password}
-      - GRAMPSWEB_TREE=${GRAMPSWEB_TREE:-Stiftung}
-      - GRAMPSWEB_BASE_URL=${GRAMPSWEB_BASE_URL:-https://ahnenforschung.vhtv-stiftung.de}
-      - GRAMPSWEB_CELERY_CONFIG__broker_url=redis://redis:6379/0
-      - GRAMPSWEB_CELERY_CONFIG__result_backend=redis://redis:6379/0
-      - GRAMPSWEB_RATELIMIT_STORAGE_URI=redis://redis:6379/1
-      - GRAMPSWEB_NEW_DB_BACKEND=sqlite
-    command:
-      - sh
-      - -c
-      - |
-        # GrampsWeb runs on its own subdomain — no subpath rewriting needed.
-        echo "[grampsweb] Ensuring admin user exists ..."
-        python3 << 'PYEOF' 2>&1 | grep -v Gtk
-        from gramps_webapi.app import create_app
-        from gramps_webapi.auth import add_user, get_number_users, ROLE_OWNER
-        import os
-        email = os.environ.get('GRAMPSWEB_ADMIN_EMAIL', '')
-        pw = os.environ.get('GRAMPSWEB_ADMIN_PASSWORD', '')
-        if email and pw:
-            app = create_app()
-            with app.app_context():
-                if get_number_users() == 0:
-                    add_user(name='Admin', email=email, password=pw, role=ROLE_OWNER)
-                    print('[grampsweb] Admin user created')
-                else:
-                    print('[grampsweb] Users already exist, skipping')
-        else:
-            print('[grampsweb] No admin credentials configured, skipping')
-        PYEOF
-        exec gunicorn -w $${GUNICORN_NUM_WORKERS:-8} -b 0.0.0.0:5000 \
-          gramps_webapi.wsgi:app --timeout $${GUNICORN_TIMEOUT:-120} \
-          --limit-request-line 8190
+      GRAMPSWEB_TREE: ${GRAMPSWEB_TREE:-Stiftung}
+      GRAMPSWEB_CELERY_CONFIG__broker_url: "redis://redis:6379/0"
+      GRAMPSWEB_CELERY_CONFIG__result_backend: "redis://redis:6379/0"
+      GRAMPSWEB_RATELIMIT_STORAGE_URI: "redis://redis:6379/1"
+      GRAMPSWEB_BASE_URL: ${GRAMPSWEB_BASE_URL:-https://ahnenforschung.vhtv-stiftung.de}
     volumes:
-      - gramps_data:/app/data
+      - gramps_users:/app/users
+      - gramps_index:/app/indexdir
+      - gramps_thumb_cache:/app/thumbnail_cache
       - gramps_cache:/app/cache
+      - gramps_secret:/app/secret
+      - gramps_db:/root/.gramps/grampsdb
+      - gramps_media:/app/media
+      - gramps_tmp:/tmp
     depends_on:
-      - db
       - redis
 
   grampsweb_celery:
-    image: ghcr.io/gramps-project/grampsweb:latest
-    restart: unless-stopped
-    environment:
-      - GRAMPSWEB_SECRET_KEY=${GRAMPSWEB_SECRET_KEY:-dev-grampsweb-secret-key-not-for-production}
-      - GRAMPSWEB_TREE=${GRAMPSWEB_TREE:-Stiftung}
-      - GRAMPSWEB_BASE_URL=${GRAMPSWEB_BASE_URL:-https://ahnenforschung.vhtv-stiftung.de}
-      - GRAMPSWEB_CELERY_CONFIG__broker_url=redis://redis:6379/0
-      - GRAMPSWEB_CELERY_CONFIG__result_backend=redis://redis:6379/0
-      - GRAMPSWEB_NEW_DB_BACKEND=sqlite
-    command: celery -A gramps_webapi.celery worker --loglevel=info
-    volumes:
-      - gramps_data:/app/data
-      - gramps_cache:/app/cache
+    <<: *grampsweb
+    ports: []
     depends_on:
+      - grampsweb
       - redis
+    command: celery -A gramps_webapi.celery worker --loglevel=INFO --concurrency=2
 
 volumes:
   dbdata:
-  gramps_data:
+  gramps_users:
+  gramps_index:
+  gramps_thumb_cache:
   gramps_cache:
+  gramps_secret:
+  gramps_db:
+  gramps_media:
+  gramps_tmp:
   ollama_data: