The href alone was not a sufficient key. /mode/convenient/vs/0 is
declared by three family registries with three meanings: a real preset
resource on the AC, explicitly unmodeled on the dehumidifier (no live
current-value field), empty on the air purifier. Matching on the href
globally meant a dehumidifier reporting a mode there would learn it,
persist it, and show it in diagnostics for a resource nothing offers.
The coordinator now narrows LEARNABLE to the hrefs a climate entity is
actually bound to, at discovery -- which also retires the per-rep
subdevice walk, since those hrefs are already actual.
With that, LEARNABLE is a plain frozenset of hrefs and the per-href
LearnRule goes away: its two fields were the same module constants for
its only entry. observe() now returns the codes it learned rather than a
bool the caller re-reads the store to interpret, so the log names what
was new instead of everything ever learned.
learned.py also takes ownership of the entry key and persisted shape --
the options flow was the second module that knew both, and the shape has
already changed once.
Comment trims throughout, per CONTRIBUTING: the LEARNABLE entry no
longer recounts how many reporters there were, and three copies of the
same test-stub comment are gone.
Marc Billow
3675d8087b