fix(notion-search): correct --filter example syntax in docs

Final review caught that both --filter example locations used simplified
JSON ({"Status": "Done"}) that Notion's data_sources.query API rejects
with a 400. The script passes --filter verbatim, so users copy-pasting
the example would hit a confusing error.

Replace with Notion's actual filter shape:
  {"property": "Status", "status": {"equals": "Done"}}

Also added a compound (and/or) example in CLAUDE.md so users have a
reference for combining filters.

30/30 tests still pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

custom-skills/31-notion-organizer/code/CLAUDE.md

@@ -28,9 +28,13 @@ python scripts/notion_search.py "AI agents" --json | jq '.[].id'
 # Constrain to specific databases
 python scripts/notion_search.py "MCP" --databases f8f19ede-32bd-43ac-9f60-0651f6f40afe
 
-# Property filter
+# Property filter (Notion's filter shape — passed verbatim to data_sources.query)
 python scripts/notion_search.py "MCP" --databases ID \
-  --filter '{"Status": "Done", "Topic": "AI"}'
+  --filter '{"property": "Status", "status": {"equals": "Done"}}'
+
+# Compound filter (and/or)
+python scripts/notion_search.py "MCP" --databases ID \
+  --filter '{"and": [{"property": "Status", "status": {"equals": "Done"}}, {"property": "Topic", "multi_select": {"contains": "AI"}}]}'
 
 # Fast mode (skip LLM stages)
 python scripts/notion_search.py "exact term" --no-rerank --no-expand