fix: power outage auto-recovery improvements

Mosquitto:
- Change restart: always (was unless-stopped) to survive daemon restarts
- Add healthcheck (pub/sub ping) for depends_on conditions
- All downstream services use condition: service_healthy

Party-lock:
- Add MQTT connection retry loop (was crashing on DNS race after restart)

Zigbee2mqtt:
- Add entrypoint wrapper that auto-applies BLZ bridge patch at startup
- Bridge patch no longer needs manual 'just z2m-patch-bridge' after image pulls

Mopidy:
- Add python3-gi + python3-gi-cairo via apt (fixes 'No module named gi')
- Set PYTHONPATH to expose system gi module to Python 3.12

infra/compose.yaml

@@ -2,7 +2,7 @@ services:
   mosquitto:
     image: eclipse-mosquitto:latest
     container_name: mosquitto
-    restart: unless-stopped
+    restart: always
     user: "1883:1883"
     ports:
       - "1883:1883"
@@ -10,6 +10,12 @@ services:
       - ./mosquitto/config:/mosquitto/config
       - ./mosquitto/data:/mosquitto/data
       - ./mosquitto/log:/mosquitto/log
+    healthcheck:
+      test: ["CMD", "sh", "-c", "timeout 3 mosquitto_sub -p 1883 -t healthcheck -C 1 --quiet & sleep 0.5 && mosquitto_pub -p 1883 -t healthcheck -m ok -r; wait"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
+      start_period: 15s
 
   zigbee2mqtt:
     image: ghcr.io/pine64/zigbee2mqtt:latest-dev   # BLZ fork, NOT koenkk
@@ -23,6 +29,7 @@ services:
       - ./zigbee2mqtt:/app/data
     devices:
       - /dev/ttyUSB0:/dev/ttyUSB0
+    entrypoint: ["/app/data/scripts/entrypoint.sh"]
     environment:
       TZ: America/Los_Angeles
 
@@ -43,7 +50,8 @@ services:
     container_name: nodered
     restart: unless-stopped
     depends_on:
-      - mosquitto
+      mosquitto:
+        condition: service_healthy
     user: "1000:1000"
     ports:
       - "1880:1880"
@@ -65,7 +73,8 @@ services:
     container_name: doorbell-listener
     restart: unless-stopped
     depends_on:
-      - mosquitto
+      mosquitto:
+        condition: service_healthy
     volumes:
       - ./doorbell-listener/state:/data/doorbell-listener
     environment:
@@ -146,7 +155,8 @@ services:
     container_name: party-lock
     restart: unless-stopped
     depends_on:
-      - mosquitto
+      mosquitto:
+        condition: service_healthy
     volumes:
       - ./mosquitto/config:/mosquitto/config
       - /var/run/docker.sock:/var/run/docker.sock