fix(mcp): harden dashboard dispatch lifecycle

Co-authored-by: naiba/CloudCode <hi+cloudcode@nai.ba>

cmd/dashboard/controller/mcp_test.go

@@ -35,6 +35,8 @@ func setupMCPTest(t *testing.T) (func(), uint64) {
 	patConnectionRegistryShared = newPATConnectionRegistry()
 	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
 	require.NoError(t, err)
+	sqlDB, err := db.DB()
+	require.NoError(t, err)
 	require.NoError(t, db.AutoMigrate(&model.User{}, &model.APIToken{}, &model.MCPAuditLog{}, &model.Server{}, &model.WAF{}))
 	singleton.DB = db
 	singleton.Conf = &singleton.ConfigClass{Config: &model.Config{JWTTimeout: 1}}
@@ -52,6 +54,7 @@ func setupMCPTest(t *testing.T) (func(), uint64) {
 	singleton.ServerShared = sc
 
 	cleanup := func() {
+		_ = sqlDB.Close()
 		singleton.DB = originalDB
 		singleton.ServerShared = originalServer
 		singleton.Conf = originalConf