fix(openapi): document /v1/loop idea/task-graph routes in the public spec (#9309)

Five REST mirrors of the loopover_* idea/task-graph MCP tools were live in
routes.ts but absent from OpenAPI. Register request/response schemas and
paths for evaluate-escalation, results-payload, progress-snapshot, intake-idea,
and plan-idea-claims (request-apr-transfer stays out of scope).

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: andriy-polanski