curl --request POST \
  --url https://app.tryordinal.com/api/v1/posts/{id}/unarchive \
  --header 'Authorization: Bearer <token>'

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "workspaceId": "660e8400-e29b-41d4-a716-446655440000",
  "archivedAt": null
}