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f10dca4318
The combo success path called recordProviderSuccess (cooldown-only) without notifying the circuit breaker. When a provider breaker entered HALF_OPEN after repeated failures, successful probe requests never transitioned it back to CLOSED -- the breaker stayed stuck indefinitely. Production evidence: agy breaker HALF_OPEN with 699 requests at 98% success rate, never recovering. Root cause: combo.ts calls recordProviderSuccess from providerCooldownTracker.ts (resets cooldown failureCount only) but never calls breaker._onSuccess(). The failure path in accountFallback.ts calls breaker._onFailure(), creating an asymmetry. Fix: add recordProviderSuccess to accountFallback.ts as the symmetric counterpart of recordProviderFailure. Uses getProviderBreaker (not configureProviderBreaker) to avoid overwriting the breaker's resetTimeout with default profile values. Calls breaker._onSuccess() for all non-OPEN states (CLOSED/DEGRADED/HALF_OPEN), matching execute()'s behavior.