[management] fix extend call and move config to types (#3575)

This PR fixes configuration inconsistencies and updates the store engine type usage throughout the management code. Key changes include:
- Replacing outdated server.Config references with types.Config and updating related flag variables (e.g. types.MgmtConfigPath).
- Converting engine constants (SqliteStoreEngine, PostgresStoreEngine, MysqlStoreEngine) to use types.Engine for consistent type–safety.
- Adjusting various test and migration code paths to correctly reference the new configuration and engine types.

management/client/client_test.go

@@ -50,7 +50,7 @@ func startManagement(t *testing.T) (*grpc.Server, net.Listener) {
 	level, _ := log.ParseLevel("debug")
 	log.SetLevel(level)
 
-	config := &mgmt.Config{}
+	config := &types.Config{}
 	_, err := util.ReadJson("../server/testdata/management.json", config)
 	if err != nil {
 		t.Fatal(err)