feat: enhance error handling with JobError struct and update extractor logic

cmd/go_migrate/extractor.go

@@ -23,20 +23,18 @@ func extractFromMssql(
 	chBatchesIn <-chan Batch,
 	chChunksOut chan<- []UnknownRowValues,
 	chErrorsOut chan<- ExtractorError,
+	chJobErrorsOut chan<- JobError,
 ) {
 	indexPrimaryKey := slices.IndexFunc(columns, func(col ColumnType) bool {
 		return strings.EqualFold(col.name, job.PrimaryKey)
 	})
 
 	if indexPrimaryKey == -1 {
-		exError := ExtractorError{
-			Batch: Batch{
-				RetryCounter: maxRetryAttempts,
-			},
-			HasLastId: false,
-			Msg:       "Primary key not found in columns provided",
+		exError := JobError{
+			ShouldCancelJob: true,
+			Msg:             "Primary key not found in provided columns",
 		}
-		chErrorsOut <- exError
+		chJobErrorsOut <- exError
 		return
 	}
 
@@ -91,6 +89,7 @@ func extractFromMssql(
 					}
 
 					lastRow := rowsChunk[len(rowsChunk)-1]
+					chChunksOut <- rowsChunk
 					chErrorsOut <- ExtractorErrorFromLastRowMssql(lastRow, indexPrimaryKey, &batch, err)
 					return
 				}