For n > 1, the image endpoints returned one preview grid instead of n images.
The endpoints now run one model batch, save each decoded sample as its own file,
and return one URL or base64 item for each image. This applies to generations
and edits.
A keyword-only return_samples field (default False) is added to OutputConfig,
SamplingParam and ForwardBatch. Batched image requests set it and do not build
preview frames. The worker keeps the sample tensor for these requests, and
non-output ranks clear the field. Defaults and positional arguments do not
change.
The image endpoints now validate size, output format and count before they
create output directories, save uploads or start generation. An invalid value
returns HTTP 400. Omitted or null values keep their defaults.
Behavior change: an explicit empty size or output format, and a count outside
1-10, now return HTTP 400. Before, the server replaced them with defaults or
clamped the count.
Boyang ZHONG