chore: update term configs, skill docs and Python 3.10 compat

- term_change_log: record watch term add history
- term_watchlist: add initial watch terms from cleanup review
- term_aliases: minor update
- filter_context.personal: reorganize interest keywords
- keyword-cleanup-review skill: clarify JSON as formal artifact, markdown as temp review copy
- openclaw_delivery: add Python <3.11 UTC import compat
- daily-keyword-index-design: update suggestion artifact semantics

src/summary_mcp/models/openclaw_delivery.py

@@ -1,6 +1,11 @@
 from __future__ import annotations
 
-from datetime import UTC, date, datetime
+try:
+    from datetime import UTC, date, datetime
+except ImportError:  # Python < 3.11 compatibility
+    from datetime import timezone, date, datetime
+
+    UTC = timezone.utc
 
 from pydantic import BaseModel, Field