Get presigned URL for downloading model weights.
Downloads the latest checkpoint by default, or specify checkpoint number via query parameter. Returns a presigned URL valid for 1 hour (configurable via R2_PRESIGNED_URL_EXPIRY).
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
User ID override via header (requires master API key)
Checkpoint number (defaults to latest)
URL expiry in seconds (1-604800, default 3600)
1 <= x <= 604800User ID override (requires master API key)