Make the Get Refresh Execution Details API response easier to debug

[asu80]

Right now if there is any error during the enhanced refresh, refresh execution details api will return messages containing "code" field. It would be useful if this "code" actually means something. It will simplify the debugging process for API callers.

An example of the API response:

{     "startTime": "2023-06-05T18:55:22.63",     "endTime": "2023-06-05T18:55:33.95",     "type": "Full",     "commitMode": "Transactional",     "status": "Failed",     "extendedStatus": "Failed",     "currentRefreshType": "Full",     "numberOfAttempts": 1,     "objects": [         {             "table": "DateTableTemplate_b285c162-7385-444a-9d14-0c863579f369",             "partition": "DateTableTemplate_b285c162-7385-444a-9d14-0c863579f369-164b95f7-1537-4d7b-bb30-0fde10843fbb",             "status": "Failed"         },         {             "table": "Query1",             "partition": "Query1-a0cbd646-a7e4-431e-a114-0c89382cbe49",             "status": "Failed"         }     ],     "messages": [         {             "message": "Retry attempts for failures while executing the refresh exceeded the retry limit set on the request.",             "type": "Warning"         },         {             "code": "0xC112001C",             "message": "...",             "type": "Error",             "location": {                 "StartLine": 0,                 "StartColumn": 0,                 "EndLine": 0,                 "EndColumn": 0,                 "LineOffset": 0,                 "TextLength": 0,                 "RowNumber": -1,                 "SourceObject": {                     "Table": "Query1",                     "Partition": "Query1-a0cbd646-a7e4-431e-a114-0c89382cbe49",                     "Column": null,                     "Measure": null,                     "Role": null                 }             }         }     ] } 

Expected: "code": "0xC112001C" actually means something. For example, "EXTERNAL_DATASOURCE_ERROR"

Actual: cannot find any documentation on "code" field.

Thanks!