feat: implement batch processing for MSSQL extraction and transformation with range handling

cmd/go_migrate/main.go

@@ -21,10 +21,10 @@ var migrationJobs []MigrationJob = []MigrationJob{
 }
 
 const (
-	NumExtractors int = 1
-	NumLoaders    int = 4
-	ChunkSize     int = 50000
-	QueueSize     int = 10
+	NumExtractors   int = 4
+	NumLoaders      int = 4
+	ChunkSize       int = 50000
+	QueueSize       int = 10
 )
 
 func main() {