refactor: rename Batch to Partition and update related types and channels for consistency

internal/app/config/migration.go

@@ -23,14 +23,17 @@ type JobConfig struct {
 	Retry          RetryConfig `yaml:"retry"`
 }
 
-type TargetTableInfo struct {
+type TableInfo struct {
 	Schema string `yaml:"schema"`
 	Table  string `yaml:"table"`
 }
 
+type TargetTableInfo struct {
+	TableInfo `yaml:",inline"`
+}
+
 type SourceTableInfo struct {
-	Schema     string `yaml:"schema"`
-	Table      string `yaml:"table"`
+	TableInfo  `yaml:",inline"`
 	PrimaryKey string `yaml:"primary_key"`
 }