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

rackpeek/docker-compose.yaml

@@ -12,6 +12,7 @@ services:
       - LETSENCRYPT_HOST=rackpeek.kolpacksoftware.com
       - PUID=1000
       - PGID=1000
+      - TZ=America/New_York
     user: "1000:1000"
     restart: unless-stopped