The legacy /v1/chat/completions approval handler (added for #4549) rendered
the approval card but never populated _STREAM_RUN_IDS, so /api/approval/respond
could not relay the user's choice back to the gateway to resume the parked run
— it fell through to the local approval path and returned {ok: false}. Record
the run_id from the approval payload (no-op when absent), mirroring the runs-API
path. Adds a behavioral regression test that fails on the pre-fix head.
Codex ship-gate finding (CORE). Co-authored-by: rodboev <rodboev@users.noreply.github.com>
