community[patch]: Add semantic info to metadata, classified by pebblo-server. (#20468)

Description: Add support for Semantic topics and entities.
Classification done by pebblo-server is not used to enhance metadata of
Documents loaded by document loaders.
Dependencies: None
Documentation: Updated.

Signed-off-by: Rahul Tripathi <rauhl.psit.ec@gmail.com>
Co-authored-by: Rahul Tripathi <rauhl.psit.ec@gmail.com>

libs/community/langchain_community/utilities/pebblo.py

@@ -6,6 +6,7 @@ import pathlib
 import platform
 from typing import Optional, Tuple
 
+from langchain_core.documents import Document
 from langchain_core.env import get_runtime_environment
 from langchain_core.pydantic_v1 import BaseModel
 
@@ -61,6 +62,10 @@ SUPPORTED_LOADERS = (*file_loader, *dir_loader, *in_memory)
 logger = logging.getLogger(__name__)
 
 
+class IndexedDocument(Document):
+    id: str
+
+
 class Runtime(BaseModel):
     """Pebblo Runtime.