Per-job persisted-recipe seed-repeat status for a project

Return every training job's persisted-recipe seed-repeat status.

Powers ENG-6302: unlike /monitoring/improvement-candidates, which labels only the single candidate it recommends per project, the live ImprovementTab a real user sees renders every training job on the project as its own adapter row and needs a status per row.

Args: project_id: Project identifier. auth: Authenticated caller.

Returns: Training job ID -> persisted-recipe seed-repeat status.

Raises: HTTPException: 403 for denied access or 404 when absent.