Update docling_core/transforms/chunker/hierarchical_chunker.py

Co-authored-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>
Signed-off-by: Bridget <bridget.mcginn@ibm.com>

Author: bridgetmcg

docling_core/transforms/chunker/hierarchical_chunker.py

@@ -130,6 +130,10 @@ def check_version_is_compatible(cls, v: str) -> str:
 class CodeDocMeta(DocMeta):
     """Data model for code chunk metadata."""
 
+    schema_name: Literal["docling_core.transforms.chunker.CodeDocMeta"] = Field(  # type: ignore[assignment]
+        default="docling_core.transforms.chunker.CodeDocMeta",
+        alias=_KEY_SCHEMA_NAME,
+    )
     doc_items: Optional[list[DocItem]] = Field(default=None, alias=_KEY_DOC_ITEMS)
     part_name: Optional[str] = Field(default=None)
     docstring: Optional[str] = Field(default=None)