[Market] Place same file order to same provider

[badkk]

If client A place order a:

{
  "order_id": "1",
  "file_identifier": "0x123",
  "provider": "5Fg..."
}

and A place another order b:

{
  "order_id": "2",
  "file_identifier": "0x123",
  "provider": "5Fg..."
}

Then we will cover a as b, this restrict client's behaviour, so we should support multiple orders mapping to same file_identifier