AI Bookmaker GPT internal API

Canonical path:
POST /api/runs
POST /api/runs/cleanup
POST /api/runs/:runId/book-pipeline {"mode":"stage-0"}
POST /api/runs/:runId/research-tasks
GET /api/runs/:runId/research-tasks
POST /api/runs/:runId/cleanup
GET /api/runs/:runId/production
POST /api/runs/:runId/release-package

Observability surfaces are disabled.