fix: fix hyperlink deserialization (#223)

Signed-off-by: Panos Vagenas <[email protected]>

Author: vagenas

docling_core/types/doc/document.py

@@ -722,7 +722,9 @@ class TextItem(DocItem):
     text: str  # sanitized representation
 
     formatting: Optional[Formatting] = None
-    hyperlink: Optional[Union[AnyUrl, Path]] = None
+    hyperlink: Optional[Union[AnyUrl, Path]] = Field(
+        union_mode="left_to_right", default=None
+    )
 
     @deprecated("Use export_to_doctags() instead.")
     def export_to_document_tokens(self, *args, **kwargs):