community: Fix KeyError in NotionDB loader when 'name' is missing (#24224)

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**Description:** This PR fixes a KeyError in NotionDBLoader when the
"name" key is missing in the "people" property.

**Issue:** Fixes #24223 

**Dependencies:** None

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>

libs/community/langchain_community/document_loaders/notiondb.py

@@ -1,3 +1,4 @@
+import logging
 from typing import Any, Dict, List, Optional
 
 import requests
@@ -10,6 +11,10 @@ DATABASE_URL = NOTION_BASE_URL + "/databases/{database_id}/query"
 PAGE_URL = NOTION_BASE_URL + "/pages/{page_id}"
 BLOCK_URL = NOTION_BASE_URL + "/blocks/{block_id}/children"
 
+# Configure logging
+logging.basicConfig(level=logging.WARNING)
+logger = logging.getLogger(__name__)
+
 
 class NotionDBLoader(BaseLoader):
     """Load from `Notion DB`.
@@ -63,7 +68,6 @@ class NotionDBLoader(BaseLoader):
             List[Document]: List of documents.
         """
         page_summaries = self._retrieve_page_summaries()
-
         return list(self.load_page(page_summary) for page_summary in page_summaries)
 
     def _retrieve_page_summaries(
@@ -133,11 +137,16 @@ class NotionDBLoader(BaseLoader):
             elif prop_type == "status":
                 value = prop_data["status"]["name"] if prop_data["status"] else None
             elif prop_type == "people":
-                value = (
-                    [item["name"] for item in prop_data["people"]]
-                    if prop_data["people"]
-                    else []
+                value = []
+                if prop_data["people"]:
+                    for item in prop_data["people"]:
+                        name = item.get("name")
+                        if not name:
+                            logger.warning(
+                                "Missing 'name' in 'people' property "
+                                f"for page {page_id}"
                             )
+                        value.append(name)
             elif prop_type == "date":
                 value = prop_data["date"] if prop_data["date"] else None
             elif prop_type == "last_edited_time":