fix(state): avoid overlapping context manager change

hermes_state.py

@@ -4429,12 +4429,6 @@ class SessionDB(SessionSearchMixin, SessionSchemaMixin, SessionPortabilityMixin)
                 conn, self._conn = self._conn, None
                 self._close_connection_quietly(conn)
 
-    def __enter__(self) -> "SessionDB":
-        return self
-
-    def __exit__(self, _exc_type, _exc, _tb) -> None:
-        self.close()
-
     def __del__(self) -> None:
         """Safety net: close the connection if the caller forgot.
 

tests/test_hermes_state.py

@@ -104,17 +104,6 @@ def _no_fts_rebuild_throttle(monkeypatch):
 
 
 class TestConnectionLifecycle:
-    def test_context_manager_closes_connection(self, tmp_path):
-        from hermes_cli.sqlite_safe_read import has_live_connection
-
-        db_path = tmp_path / "context-managed.db"
-        with SessionDB(db_path=db_path) as managed:
-            managed.create_session("s-context", source="test")
-            assert has_live_connection(db_path) is True
-
-        assert managed._conn is None
-        assert has_live_connection(db_path) is False
-
     def test_failed_writable_open_does_not_leak_tracked_connection(
         self, tmp_path, monkeypatch
     ):