Include TotalSummary in CRUD responses to eliminate redundant API calls

Backend changes:
- Add WithSummaryResponse wrappers for Task, TaskCompletion, and Residence CRUD
- Update services to return summary with all mutations (create, update, delete)
- Update handlers to pass through new response types
- Add getSummaryForUser helper for fetching summary in CRUD operations
- Wire ResidenceService into TaskService for summary access
- Add summary field to JoinResidenceResponse

This optimization eliminates the need for a separate getSummary() call after
every task/residence mutation, reducing network calls from 2 to 1.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/router/router.go

@@ -96,9 +96,10 @@ func SetupRouter(deps *Dependencies) *gin.Engine {
 	documentService := services.NewDocumentService(documentRepo, residenceRepo)
 	notificationService := services.NewNotificationService(notificationRepo, deps.PushClient)
 
-	// Wire up notification and email services to task service (for task completion notifications)
+	// Wire up notification, email, and residence services to task service
 	taskService.SetNotificationService(notificationService)
 	taskService.SetEmailService(deps.EmailService)
+	taskService.SetResidenceService(residenceService) // For including TotalSummary in CRUD responses
 	subscriptionService := services.NewSubscriptionService(subscriptionRepo, residenceRepo, taskRepo, contractorRepo, documentRepo)
 	taskTemplateService := services.NewTaskTemplateService(taskTemplateRepo)