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

radicale/config

@@ -0,0 +1,13 @@
+[server]
+hosts = 0.0.0.0:5232
+
+[auth]
+type = htpasswd
+htpasswd_filename = /config/users
+htpasswd_encryption = bcrypt
+
+[storage]
+filesystem_folder = /data/collections
+
+[logging]
+level = info

radicale/docker-compose.yml

@@ -0,0 +1,9 @@
+services:
+  radicale:
+    image: tomsquest/docker-radicale
+    restart: unless-stopped
+    ports:
+      - 5232:5232
+    volumes:
+      - /mnt/ssd/dbs/radicale/data:/data
+      - /mnt/ssd/dbs/radicale/config:/config