v0.27.1

Changelog

• 780a15e catalog: add Qwen3.8 Max on Fireworks
• 6510583 provider: keep subscriptions as model lanes
• 414b956 wire/runtime: billing-lock message reflects the lane split — a negative balance pauses hosted models only; BYOK keeps serving (gateway folds the lock into LimitToKeyed instead of refusing at the door)
• fcaae3d wire/runtime: credits-exhausted message leads with /apikeys — 'add credits' doesn't exist on the BYOK-only Free plan; keys are the fix on every plan