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/mopidy/Dockerfile

@@ -14,12 +14,20 @@ RUN apt-get update \
       libpango-1.0-0 \
       libpangoft2-1.0-0 \
       libgirepository-1.0-1 \
-      libgirepository1.0-dev \
       gir1.2-glib-2.0 \
       gir1.2-gstreamer-1.0 \
       gir1.2-gst-plugins-base-1.0 \
  && rm -rf /var/lib/apt/lists/*
 
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      python3-gi \
+      python3-gi-cairo \
+ && rm -rf /var/lib/apt/lists/*
+
+# Expose the system Python's gi module to Python 3.12 (/usr/local).
+ENV PYTHONPATH=/usr/lib/python3/dist-packages:${PYTHONPATH}
+
 RUN pip install --no-cache-dir \
     "setuptools<80" \
     Mopidy==3.4.2 \