Fixture is a scrubbed diagnostics dump from the unit the writes and
calibrations were verified on; the issue #136 unit is the same model with a
slightly different token set (no Spi, FilterTime_5460, OutdoorTemp_81), which
the presence gating handles the same way.
Covers the pieces the golden's state_keys can't: that the token entities stay
off newer boards, that an absent token yields no entity, that humidity's zero
reads as unknown, that fan/swing/preset read and write through /airflow/vs/0
and the Comode token, and that a board with /wind/* and /mode/convenient/vs/0
still takes the resource paths.
Refs #136
perseus177
3032b0c032