infra: 2026-10-26 version audit, upgrades, UniFi re-removal

- Synapse v1.163.2, MAS 1.27.1, Traefik v3.7, node-exporter v1.12.1 (all
  nodes), cadvisor -> ghcr.io v0.60.6, alertmanager-receiver 2026.9.23,
  Gitea 1.26.4, Jellyfin 12.3, Seerr v3.5.1
- Watchtower -> nickfedor/watchtower fork, twice daily (04:00/16:00)
- Monitoring legacy node-exporter gated behind a compose profile
- unifi-os-server on .100 removed again; compose file renamed so it
  cannot be revived
- CLAUDE.md: Known Issues #40-43, service tree updates

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NQhgEUqcaV4WM2S4hfXgHD

compose/hf-pdocker-02/unifi/docker-compose.yml.decommissioned-20261026

@@ -0,0 +1,67 @@
+services:
+  unifi:
+    image: lscr.io/linuxserver/unifi-network-application:latest
+    container_name: unifi
+    restart: unless-stopped
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=America/Chicago
+      - MONGO_USER=${UNIFI_MONGO_USER}
+      - MONGO_PASS=${UNIFI_MONGO_PASS}
+      - MONGO_HOST=unifi-db
+      - MONGO_PORT=27017
+      - MONGO_DBNAME=unifi
+    volumes:
+      - /mnt/docker-data/configs/unifi/data:/config
+    ports:
+      - "8443:8443"
+      - "3478:3478/udp"
+      - "10001:10001/udp"
+      - "8080:8080"
+      - "1900:1900/udp"
+      - "8843:8843"
+      - "8880:8880"
+      - "6789:6789"
+      - "5514:5514/udp"
+    depends_on:
+      unifi-db:
+        condition: service_healthy
+    networks:
+      - unifi-internal
+    mem_limit: 1G
+    memswap_limit: 1G
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "50m"
+        max-file: "3"
+
+  unifi-db:
+    image: mongo:7.0
+    container_name: unifi-db
+    restart: unless-stopped
+    user: "1024:100"
+    volumes:
+      - /mnt/docker-data/databases/unifi-db:/data/db
+    networks:
+      - unifi-internal
+    labels:
+      - "com.centurylinklabs.watchtower.enable=false"
+    mem_limit: 1G
+    memswap_limit: 1G
+    healthcheck:
+      test: ["CMD-SHELL", "mongosh --eval 'db.adminCommand(\"ping\")' --quiet"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "50m"
+        max-file: "3"
+
+networks:
+  unifi-internal:
+    driver: bridge