Message Victor about broken fleet-task agent-scoped completion endpoint

POST /api/v1/agents/slava-agent/tasks/<id>/complete returns 404; the global PATCH /api/v1/tasks/<id> with {"status":"completed","result":"..."} works. Repro: task 0e4fcad6-ed76-47a0-9e25-b02242727658 on 2026-10-02. Ask Victor to fix or deprecate the broken route. Include working curl examples.