fix(mem0-plugin): review fixes — loop guard, v3 response format, robustness

- on_stop_cursor.sh: add loop_count guard to prevent infinite re-entry
- on_stop.sh: drop set -e so stats failure doesn't kill the reminder
- _identity.py: fix fallback stub signatures to match production (accept cwd arg)
- on_pre_compact.py: add missing infer=False on session_state writes
- on_session_start.sh: handle v3 search response format (dict with results key)
- Align all plugin versions to 0.2.1 (Claude Code, Codex, Cursor)

mem0-plugin/scripts/on_pre_compact.py

@@ -186,6 +186,7 @@ def store_memory(api_key: str, content: str, user_id: str, source: str, session_
         "app_id": project_id,
         "metadata": metadata,
         "expiration_date": expires,
+        "infer": False,
     }
 
     data = json.dumps(body).encode("utf-8")