List deletion requests

curl http://localhost:8080/api/v1/account-deletion \
  -H "Authorization: Bearer <token>"

{
  "requests": [
    {
      "id": "d1a2b3c4-d5e6-7890-abcd-ef1234567890",
      "organization_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
      "requested_by": "u1a2b3c4-d5e6-7890-abcd-ef1234567890",
      "reason": "Switching to a different provider",
      "scheduled_for": "2026-04-21T00:00:00Z",
      "processed_at": null,
      "status": "requested",
      "created_at": "2026-03-21T10:00:00Z",
      "updated_at": "2026-03-21T10:00:00Z"
    }
  ]
}