fix gateway loopback validation chains

apps/api/internal/store/runtime_policies.go

@@ -107,6 +107,33 @@ func (s *Store) DeleteRuntimePolicySet(ctx context.Context, id string) error {
 	return nil
 }
 
+func (s *Store) DisableCandidatePlatform(ctx context.Context, platformID string) error {
+	if strings.TrimSpace(platformID) == "" {
+		return nil
+	}
+	_, err := s.pool.Exec(ctx, `
+UPDATE integration_platforms
+SET status = 'disabled',
+    updated_at = now()
+WHERE id = $1::uuid`, platformID)
+	return err
+}
+
+func (s *Store) CooldownCandidatePlatform(ctx context.Context, platformID string, cooldownSeconds int) error {
+	if strings.TrimSpace(platformID) == "" {
+		return nil
+	}
+	if cooldownSeconds <= 0 {
+		cooldownSeconds = 300
+	}
+	_, err := s.pool.Exec(ctx, `
+UPDATE integration_platforms
+SET cooldown_until = now() + ($2::int * interval '1 second'),
+    updated_at = now()
+WHERE id = $1::uuid`, platformID, cooldownSeconds)
+	return err
+}
+
 func scanRuntimePolicySet(scanner runtimePolicyScanner) (RuntimePolicySet, error) {
 	var item RuntimePolicySet
 	var rateLimitPolicy []byte