refactor(state): keep hermes_state_sessions.py under the file cap after the rebase

Main grew the facade by 12 lines; the list-row docstring folds to one line.

hermes_state_sessions.py

@@ -842,10 +842,7 @@ class SessionSessionsMixin:
         return self._session_row_dict(row) if row else None
 
     def get_session_list_row(self, session_id: str) -> Optional[dict[str, Any]]:
-        """The picker fields only, without ``get_session``'s prompt/tool JOIN and token flush.
-
-        The live listing reads one row per listed session on the gateway's loop; a full hydration
-        there is the cost the sweep does not need (title/source/activity/is-it-closed are columns)."""
+        """Picker columns only: the live listing skips ``get_session``'s prompt/tool JOIN and flush."""
         row = self._read_one(
             "SELECT id, source, title, started_at, ended_at, message_count, model, hidden, archived "
             "FROM sessions WHERE id = ?",