Stability AI Async Result Fetcher

Use this endpoint after calling any asynchronous Stability AI generation endpoint (such as Upscale Creative, Stable Fast 3D, Generate SD3, Style Transfer, etc.) that returns a job ID instead of an immediate result. This is the standard polling/retrieval step in the async workflow — call it once the generation task has had time to complete.

• Job ID not found or expired — 404 error if the ID is invalid or result has been purged
• Job still in progress — may return a pending/processing status rather than a final result
• Malformed job ID — 400 validation error if the ID string format is invalid
• Unauthorized access — 401/403 if credentials are missing or the job belongs to a different account
• Timeout or server error — 500 if the generation backend is unavailable