fix(lint): gofmt formatting fixes for 3 files

Align struct field assignments and fix indentation detected by
golangci-lint v2.9's gofmt checker.

backend/internal/handler/dto/mappers.go

@@ -125,9 +125,9 @@ func GroupFromServiceAdmin(g *service.Group) *AdminGroup {
 		Group:                groupFromServiceBase(g),
 		ModelRouting:         g.ModelRouting,
 		ModelRoutingEnabled:  g.ModelRoutingEnabled,
-		MCPXMLInject:       g.MCPXMLInject,
-		DefaultMappedModel: g.DefaultMappedModel,
-		SupportedModelScopes:  g.SupportedModelScopes,
+		MCPXMLInject:         g.MCPXMLInject,
+		DefaultMappedModel:   g.DefaultMappedModel,
+		SupportedModelScopes: g.SupportedModelScopes,
 		AccountCount:         g.AccountCount,
 		SortOrder:            g.SortOrder,
 	}

backend/internal/pkg/apicompat/types.go

@@ -60,7 +60,7 @@ type AnthropicContentBlock struct {
 
 // AnthropicTool describes a tool available to the model.
 type AnthropicTool struct {
-	Type        string          `json:"type,omitempty"`        // e.g. "web_search_20250305" for server tools
+	Type        string          `json:"type,omitempty"` // e.g. "web_search_20250305" for server tools
 	Name        string          `json:"name"`
 	Description string          `json:"description,omitempty"`
 	InputSchema json.RawMessage `json:"input_schema"` // JSON Schema object

backend/internal/repository/api_key_repo.go

@@ -165,8 +165,8 @@ func (r *apiKeyRepository) GetByKeyForAuth(ctx context.Context, key string) (*se
 				group.FieldModelRouting,
 				group.FieldMcpXMLInject,
 				group.FieldSupportedModelScopes,
-			group.FieldAllowMessagesDispatch,
-			group.FieldDefaultMappedModel,
+				group.FieldAllowMessagesDispatch,
+				group.FieldDefaultMappedModel,
 			)
 		}).
 		Only(ctx)

backend/internal/service/api_key_rate_limit_test.go

@@ -78,11 +78,11 @@ func TestAPIKey_EffectiveUsage(t *testing.T) {
 	now := time.Now()
 
 	tests := []struct {
-		name      string
-		key       APIKey
-		want5h    float64
-		want1d    float64
-		want7d    float64
+		name   string
+		key    APIKey
+		want5h float64
+		want1d float64
+		want7d float64
 	}{
 		{
 			name: "all windows active",