Add scripts/z2m_repair.py that:
- Opens permit_join for N seconds (default 120)
- Subscribes to bridge/event on the local MQTT broker
- For each device_joined event, auto-renames the device back to its
original friendly name (hardcoded IEEE->name mapping from the
last known good state, overridable via --mapping).
After the zigbee2mqtt database was wiped, the user had to manually
pair each device via the web UI. With this recipe, devices rejoin
automatically when woken (network_key preserved), and the script
restores friendly names as they join.
Add justfile recipes:
just z2m-repair [TIME=120] - run the auto-repair script
just z2m-rename IEEE NAME - rename a single device by IEEE
