refactor: separate auth config from runtime and defer token resolution (#5105)

pkg/config/v1/validation/validator.go

@@ -0,0 +1,28 @@
+package validation
+
+import (
+	"fmt"
+
+	"github.com/fatedier/frp/pkg/policy/security"
+)
+
+// ConfigValidator holds the context dependencies for configuration validation.
+type ConfigValidator struct {
+	unsafeFeatures *security.UnsafeFeatures
+}
+
+// NewConfigValidator creates a new ConfigValidator instance.
+func NewConfigValidator(unsafeFeatures *security.UnsafeFeatures) *ConfigValidator {
+	return &ConfigValidator{
+		unsafeFeatures: unsafeFeatures,
+	}
+}
+
+// ValidateUnsafeFeature checks if a specific unsafe feature is enabled.
+func (v *ConfigValidator) ValidateUnsafeFeature(feature string) error {
+	if !v.unsafeFeatures.IsEnabled(feature) {
+		return fmt.Errorf("unsafe feature %q is not enabled. "+
+			"To enable it, ensure it is allowed in the configuration or command line flags", feature)
+	}
+	return nil
+}