Triggers asynchronous build processing. This is step 3 of the ZIP upload flow (after uploading your ZIP to the presigned URL).
What happens during processing:
ready or failedProcessing typically takes 1–5 minutes. Poll GET /builds/{build_id} or use build logs to track progress.
The build must be in uploading status. Returns 400 if the build has already been processed or is in another state.
Build ID returned by the upload-url endpoint.
Build name (must match the name used during upload). Required for version tracking.
Build processing triggered. Poll GET /builds/{build_id} for status updates.