Routes stateful Google Meet tool actions through the gateway-owned runtime so create/join/status/speak/leave share the same session owner instead of losing tool-created realtime sessions after the agent turn.
Also preserves structured gateway error details for missing session ids and tightens node-host child cleanup for already-closed sessions.
Fixes#72440.
Co-authored-by: BSnizND <199837910+BsnizND@users.noreply.github.com>