hosterNotAvailable was added to isTemporaryUnrestrictError which
triggered aggressive provider-level cooldowns (up to 180s) that
blocked ALL items for the affected provider. Since items kept
failing, the cooldown never expired (15-min reset threshold never
reached), causing retries to effectively stall.
Fix: remove hosterNotAvailable from isTemporaryUnrestrictError.
It still gets normal unrestrict retry with item-level backoff
(5s -> 120s) via isUnrestrictFailure, but without provider-wide
cooldown blocking other items.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
