Sync infra config: HA/Zabbix relocation, Immich storage move, new services

Accumulated uncommitted infra changes:
- Caddyfile: repoint HA/Zabbix to 192.168.1.4/.3, add ~20 new site routes
- Immich: move media to /mnt/smsg, enable CUDA ML, mem limits, rewrite backup.sh
- Add service stacks: agap-mcp, anki, family, freshrss, iperf3, kanboard,
  linkwarden, qbittorrent, radicale, syncthing, vikunja, windows
- openwebui: enable API keys; ollama: drop CPU fallback
- seafile/zabbix: extra_hosts entries; matrix: add user juris
- Remove pihole stack and stale wiki/migrate.py
- Ignore marketplace-mcp (standalone repo) and linkwarden runtime data

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LeqyaxJF2nbRXJtae2kNB2

vikunja/docker-compose.yml

@@ -0,0 +1,13 @@
+services:
+  vikunja:
+    image: vikunja/vikunja:2.2.2
+    environment:
+      VIKUNJA_SERVICE_PUBLICURL: https://todo.alogins.net/
+      VIKUNJA_SERVICE_JWTSECRET: 13122c95a1fa87bc5f4aefbfc415f7b6e3c2c9e9ba3f784e905c514fec19ae9d9b69
+      VIKUNJA_DATABASE_PATH: /db/vikunja.db
+    ports:
+      - 3457:3456
+    volumes:
+      - /mnt/ssd/dbs/vikunja/files:/app/vikunja/files
+      - /mnt/ssd/dbs/vikunja/db:/db
+    restart: unless-stopped