fix: extract response from api_image_request in picture description (#2571)

Signed-off-by: Peter El Hachem <[email protected]>
Co-authored-by: Peter El Hachem <[email protected]>

Author: ElHachem02

docling/models/picture_description_api_model.py

@@ -51,7 +51,7 @@ def _annotate_images(self, images: Iterable[Image.Image]) -> Iterable[str]:
         # Note: technically we could make a batch request here,
         # but not all APIs will allow for it. For example, vllm won't allow more than 1.
         def _api_request(image):
-            return api_image_request(
+            response, _ = api_image_request(
                 image=image,
                 prompt=self.options.prompt,
                 url=self.options.url,
@@ -60,5 +60,7 @@ def _api_request(image):
                 **self.options.params,
             )
 
+            return response
+
         with ThreadPoolExecutor(max_workers=self.concurrency) as executor:
             yield from executor.map(_api_request, images)