Z2M, discovery-guard and interview-watch use the certificate of the
register account zigbee2mqtt-bridge on the mTLS listener :8884 instead of
the legacy password. Z2M gets server/ca/cert/key by env because its
configuration.yaml on the PVC is never re-seeded. The init container no
longer renders mqtt_password. The legacy broker user stays until a later
broker roll.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>