discover() only emitted a BoundEntity per capability *entity*, so a
coverage-only Capability (entities=(), used to mark a href as handled
elsewhere -- e.g. the AC climate card's wind/strength, wind/direction,
temperature/control hrefs) produced zero rows. The coordinator computed
its hot/warm href lists by walking `bound`, so every such href's
poll_tier was silently discarded and it fell back to the ~30s summary
poll only -- no sub-poll cadence and never attempted for OCF OBSERVE.
This is the root cause of issue #166's "up to a minute" lag for
remote-driven fan-speed changes: /wind/strength/vs/0 carries poll_tier
'warm' via airconditioner.COVERAGE but never reached
_hot_hrefs/_warm_hrefs, so it wasn't in the OBSERVE-attempt href list
and only refreshed on the summary poll.
discover() now takes an optional tier_log(href, poll_tier) callback
fired for every href a capability matches, entities or not. The
coordinator uses it directly instead of deriving tiers from `bound`.
Marc Billow
71e026b804