[agent-orchestrator] bug: staging invitation targets unavailable [local] callback

## Observed symptom bug: staging invitation targets unavailable [local] callback A user reported previously accepting a staging organization invitation and reaching an unavailable [local] destination. Current replay and separate callback checks establish the following; prior acceptance and membership have not been independently verified. - The original email links to an AuthKit `/invite` URL. Its query did not contain `redirect_uri`. - The subsequent AuthKit page contains `redirect_uri=http://[local]/callback` and currently displays **Invalid invitation**, with guidance for users who already accepted. - Separately opening `http://[local]/callback` returns **ERR_CONNECTION_REFUSED**. A listener check found nothing listening on port 5174; a direct HTTP check also failed to connect. ## Environment GitHub Untrivial-ai/agent-orchestrator #5779 ## Trigger / context Public GitHub report in Untrivial-ai/agent-orchestrator (FRESH_14D). ## Source evidence - https://github.com/Untrivial-ai/agent-orchestrator/issues/5779 (2026-09-24T03:26:29Z) — evidence_class: PRIMARY_ISSUE_REPORT — #5779 ## Freshness - classification: FRESH_14D - retrieved_at: 2026-10-02T10:50:53.329738Z - scout_id: C7809a7846c ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome. Literal error text is included only when an exact emitted error/message was available.