refactor: remove unused ColumnType and inspect-columns files; update migration job to use separate table analyzers for source and target databases

cmd/go_migrate/main.go

@@ -91,7 +91,8 @@ func processMigrationJobs(
 	chJobs := make(chan config.Job, len(jobs))
 	var wgJobs sync.WaitGroup
 
-	tableAnalyzer := table_analyzers.NewMssqlTableAnalyzer(sourceDb)
+	sourceTableAnalyzer := table_analyzers.NewMssqlTableAnalyzer(sourceDb)
+	targetTableAnalyzer := table_analyzers.NewPostgresTableAnalyzer(targetDb)
 	extractor := extractors.NewMssqlExtractor(sourceDb)
 	transformer := transformers.NewMssqlTransformer()
 	loader := loaders.NewPostgresLoader(targetDb)
@@ -102,9 +103,8 @@ func processMigrationJobs(
 				log.Infof("[worker %d] >>> Processing job: %s.%s <<<", i, job.SourceTable.Schema, job.SourceTable.Table)
 				res := processMigrationJob(
 					ctx,
-					sourceDb,
-					targetDb,
-					tableAnalyzer,
+					sourceTableAnalyzer,
+					targetTableAnalyzer,
 					extractor,
 					transformer,
 					loader,