connect() resolved client.device_id as `self._device_id or resolved_device_id`,
so a configured MATRIX_DEVICE_ID masked the live whoami() device. With
persisted A, configured A and a rotated token reporting B, the reset
compared A to A and never fired — exactly the token-rotation case this PR
claims to handle.
An access token is bound to one device and the homeserver only accepts key
uploads for that device, so a configured value naming a different one
cannot work. The live whoami() device now wins on conflict and logs an
error naming both. The configured value is still preferred when whoami()
reports no device.
Adds a connect()-level regression for persisted A + configured A +
whoami B, and corrects test_connect_uses_configured_device_id_over_whoami,
whose stated premise this inverts.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ckaznocha
907bdc7856