feat: refactor chunk handling in loader and transformer for improved data processing

cmd/go_migrate/transformer.go

@@ -9,7 +9,7 @@ import (
 func transformRowsMssql(
 	columns []ColumnType,
 	chChunksIn <-chan Chunk,
-	chChunksOut chan<- []UnknownRowValues,
+	chChunksOut chan<- Chunk,
 	chJobErrorsOut chan<- JobError,
 ) {
 	chunkCount := 0
@@ -67,6 +67,6 @@ func transformRowsMssql(
 		log.Infof("Transformed chunk: %d rows in %v (%.0f rows/sec) - Total: %d rows",
 			len(chunk.Data), chunkDuration, rowsPerSec, totalRowsTransformed)
 
-		chChunksOut <- chunk.Data
+		chChunksOut <- chunk
 	}
 }