ResolveChain falls back to every enabled metadata provider when a library
+ content-level has no enabled chain entry. That fallback was media-type
blind: a provider declaring default_priority only for an unrelated level
(e.g. an audiobook provider declaring {"audiobook": N}) was kept in the
list (merely sorted last) and invoked for video content levels.
In production this made silo.audiobook-metadata hammer external audiobook
APIs with anime/movie/series titles every scheduled enrichment pass
(MatchWorker, 30s) for the season/episode levels that had no enabled chain
entry. Disabling the chain entries did not help because the fallback never
consults them; only disabling the installation removed it from the global
set.
Treat a non-empty default_priority map as the provider enumerating the
content levels it supports: in resolveEnabledProvidersByPriority, exclude
providers whose declared map omits the requested level instead of ranking
them last. Providers that declare no default_priority make no claim and
stay eligible everywhere (legacy behavior).
Fixes#105
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
