* fix: escalate to model fallback after rate-limit profile rotation cap
Per-model rate limits (e.g. Anthropic Sonnet-only quotas) are not
relieved by rotating auth profiles — if all profiles share the same
model quota, cycling between them loops forever without falling back
to the next model in the configured fallbacks chain.
Apply the same rotation-cap pattern introduced for overloaded_error
(#58348) to rate_limit errors:
- Add `rateLimitedProfileRotations` to auth.cooldowns config (default: 1)
- After N profile rotations on a rate_limit error, throw FailoverError
to trigger cross-provider model fallback
- Add `resolveRateLimitProfileRotationLimit` helper following the same
pattern as `resolveOverloadProfileRotationLimit`
Fixes#58572
* fix: cap prompt-side rate-limit failover (#58707) (thanks @Forgely3D)
* fix: restore latest-main gates for #58707
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Co-authored-by: Ember (Forgely3D) <ember@forgely.co>
Co-authored-by: Peter Steinberger <steipete@gmail.com>
