cleanup: remove quizmaster and leafweb (unused/orphaned), add watchtower monitor-only labels, minor consistency fixes

- quizmaster: removed entirely (test service, no longer used); also removed Portainer stack and /srv/quizmaster data
- leafweb: removed orphaned MSSQL compose file (no running container, no Portainer stack, no data on disk)
- authelia, gitea, couchdb, portainer, immich (server + ml): add com.centurylinklabs.watchtower.monitor-only=true so watchtower still notifies on new versions without auto-applying them
- ladder: restore restart: unless-stopped (was commented out)
- rackpeek: add missing TZ env var

couchdb/docker-compose.yml

@@ -3,6 +3,8 @@ services:
     image: couchdb
     container_name: couchdb
     restart: always
+    labels:
+      - com.centurylinklabs.watchtower.monitor-only=true
     ports:
       - "127.0.0.1:5984:5984"
     environment: