Assigning a Shelly now issues a real broker credential so the physical device can
connect (onboarding was incomplete before):
- MqttCredentialProvisioner writes a mosquitto-compatible PBKDF2-SHA512 ($7$)
password line (in PHP) for username = the device's topic prefix, and touches a
reload trigger. A small wrapper in the mosquitto container (docker/mosquitto/
config/entrypoint.sh) SIGHUPs mosquitto so it re-reads the passwd live — no
restart. Verified: a provisioned device authenticates and publishes to its own
prefix (bound by the pattern %u ACL).
- The credential is shown once on the device page after assignment (enter it into
the Shelly). passwd is app-owned + world-readable so the web request can write it.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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