feat(postgres): support sequence objects

crates/dbx-core/src/transfer.rs

@@ -2960,7 +2960,9 @@ where
                 rewrite_postgres_routine_schema(&object.source, &request.target_schema)
                     .unwrap_or_else(|| object.source.clone())
             }
-            db::ObjectSourceKind::Package | db::ObjectSourceKind::PackageBody => object.source.clone(),
+            db::ObjectSourceKind::Sequence | db::ObjectSourceKind::Package | db::ObjectSourceKind::PackageBody => {
+                object.source.clone()
+            }
         };
         let statements = build_executable_object_source_statements(EditableObjectSourceSqlInput {
             database_type: DatabaseType::Postgres,