Can invoice_transaction_summaries and order_transaction_summaries tables be eliminated? Otherwise, add CRUD methods

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "description": "Order transactions summary",
  "type": "object",
  "extends" : {
    "$ref" : "../../common/schemas/entity.json"
  },
  "properties": {
    "id": {
      "description": "UUID of this summary",
      "$ref": "../../common/schemas/uuid.json"
    },
    "numTransactions": {
      "description": "Total number of transactions (encumbrances) expected for this order. Negative value indicates that all transactions have been processed",
      "type": "integer"
    }
  },
  "additionalProperties": false,
  "required": [
    "id",
    "numTransactions"
  ]
}