Add queue management dashboard (#15202)
Adds a comprehensive queue management interface to the admin panel for
viewing and managing background jobs.
**Features:**
- Queue detail pages showing paginated job lists (50 per page)
- Filter jobs by state: completed, failed, active, waiting, delayed,
paused
- Checkbox selection with bulk actions (delete jobs, retry failed jobs)
- Per-job dropdown menu for individual retry/delete
- Expandable rows showing error messages, stack traces, and job data
- Relative timestamps with hover tooltips
- Display attempt counts on failed jobs
- Dynamic retention policy info from backend
**Changes:**
- Backend: New AdminPanelQueueService with GraphQL endpoints for job
listing, retry, and delete
- Frontend: Queue detail page with QueueJobsTable component
- Updated retention policy: completed jobs kept 4 hours, failed jobs
kept 7 days (max 1000 each)
- Added JobState enum for type safety
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<img width="490" height="643" alt="Screenshot_2025-10-20_at_11 45 05"
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<img width="685" height="662" alt="Screenshot 2025-10-20 at 13 15 01"
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