Task 14 of the slice plan. Orchestrates a Quick Capture submit:
trims/validates input, creates the note row + pending_jobs row
in one repo.create transaction, persists each pasted PNG via
MediaStore (relPath stored in media table), then awaits the
injected enqueue() (AiWorker.enqueue at runtime) and fires
celebrate() (NotificationService.celebrate). deleteNote drops
the db row (cascading note_tags / media / pending_jobs) and
removes the on-disk media directory afterwards.
Verification: `npx vitest run tests/unit/CaptureService.test.ts`
4 passed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
