Closes#14726
### Added
- `trashRetentionDays` field to workspace entity (default: 14 days)
- Automated trash cleanup using BullMQ jobs
- Daily cron (00:10 UTC) that enqueues cleanup jobs for all active
workspaces
- Per-workspace limit: 100k records deleted per day
- Calendar-based retention: records deleted on day X are cleaned up X+14
days later (at midnight UTC boundaries)
### Architecture
- **Cron (WorkspaceTrashCleanupCronJob):** Runs daily, enqueues jobs in
parallel for all workspaces
- **Job (WorkspaceTrashCleanupJob):** Processes individual workspace
cleanup
- **Service (WorkspaceTrashCleanupService):** Discovers tables with
`deletedAt`, deletes old records with quota enforcement
- **Command:** `npx nx run twenty-server:command
cron:workspace:cleanup-trash` to register the cron
### Testing
- Unit tests for service with 100% coverage of public API
- Tested quota enforcement, error handling, and edge cases
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Co-authored-by: Félix Malfait <felix.malfait@gmail.com>