feat: Maximum image size for Vlm models (#1802)

* Image scale moved to base vlm options.
Added max_size image limit (options and vlm models).

* DCO Remediation Commit for Shkarupa Alex <shkarupa.alex@gmail.com>

I, Shkarupa Alex <shkarupa.alex@gmail.com>, hereby add my Signed-off-by to this commit: e93602a0d02fdb6f6dea1f65686cffcc4c616011

Signed-off-by: Shkarupa Alex <shkarupa.alex@gmail.com>

---------

Signed-off-by: Shkarupa Alex <shkarupa.alex@gmail.com>

docling/datamodel/base_models.py

@@ -253,11 +253,18 @@ class Page(BaseModel):
             return []
 
     def get_image(
-        self, scale: float = 1.0, cropbox: Optional[BoundingBox] = None
+        self,
+        scale: float = 1.0,
+        max_size: Optional[int] = None,
+        cropbox: Optional[BoundingBox] = None,
     ) -> Optional[Image]:
         if self._backend is None:
             return self._image_cache.get(scale, None)
 
+        if max_size:
+            assert self.size is not None
+            scale = min(scale, max_size / max(self.size.as_tuple()))
+
         if scale not in self._image_cache:
             if cropbox is None:
                 self._image_cache[scale] = self._backend.get_page_image(scale=scale)