注册开关读取失败时改为关闭，堵住配置缺失时未授权开注册；OAuth 自动注册同样 fail-closed。metric 持平 8。

Result: {"status":"keep","total_issues":8,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":86,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_exhaustive":0,"golint_vetx_total":0,"vitest_failed":0,"vitest_total":126}

internal/apps/oauth/handler_callback.go

@@ -195,7 +195,7 @@ func handleCallbackLogin(ctx context.Context, c *gin.Context, source *model.Auth
 func handleCallbackRegister(ctx context.Context, c *gin.Context, source *model.AuthSource, userInfo *model.OAuthUserInfo) (model.User, bool) {
 	registrationEnabled, regErr := repository.GetBoolByKey(ctx, model.ConfigKeyRegistrationEnabled)
 	if regErr != nil {
-		registrationEnabled = true
+		registrationEnabled = false
 	}
 
 	if !registrationEnabled {