Remove embedded completions from task response

Since completions are fetched separately via GetCompletionsByTask,
there's no need to embed them in the task JSON response.

- Remove Completions field from TaskResponse (keep CompletionCount)
- Remove Completions.CompletedBy preloads from task queries

This reduces response payload size and improves query performance.

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

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

internal/dto/responses/task.go

@@ -90,10 +90,9 @@ type TaskResponse struct {
 	ContractorID    *uint                    `json:"contractor_id"`
 	IsCancelled     bool                     `json:"is_cancelled"`
 	IsArchived      bool                     `json:"is_archived"`
-	ParentTaskID    *uint                    `json:"parent_task_id"`
-	CompletionCount int                      `json:"completion_count"`
-	Completions     []TaskCompletionResponse `json:"completions,omitempty"`
-	CreatedAt       time.Time                `json:"created_at"`
+	ParentTaskID    *uint     `json:"parent_task_id"`
+	CompletionCount int       `json:"completion_count"`
+	CreatedAt       time.Time `json:"created_at"`
 	UpdatedAt       time.Time                `json:"updated_at"`
 }
 
@@ -252,11 +251,6 @@ func NewTaskResponse(t *models.Task) TaskResponse {
 		resp.Frequency = NewTaskFrequencyResponse(t.Frequency)
 	}
 
-	resp.Completions = make([]TaskCompletionResponse, len(t.Completions))
-	for i, c := range t.Completions {
-		resp.Completions[i] = NewTaskCompletionResponse(&c)
-	}
-
 	return resp
 }
 

internal/repositories/task_repo.go

@@ -31,7 +31,6 @@ func (r *TaskRepository) FindByID(id uint) (*models.Task, error) {
 		Preload("Status").
 		Preload("Frequency").
 		Preload("Completions").
-		Preload("Completions.CompletedBy").
 		First(&task, id).Error
 	if err != nil {
 		return nil, err
@@ -136,7 +135,6 @@ func (r *TaskRepository) GetKanbanData(residenceID uint, daysThreshold int) (*mo
 		Preload("Status").
 		Preload("Frequency").
 		Preload("Completions").
-		Preload("Completions.CompletedBy").
 		Where("residence_id = ? AND is_archived = ?", residenceID, false).
 		Order("due_date ASC NULLS LAST, priority_id DESC, created_at DESC").
 		Find(&tasks).Error
@@ -261,7 +259,6 @@ func (r *TaskRepository) GetKanbanDataForMultipleResidences(residenceIDs []uint,
 		Preload("Status").
 		Preload("Frequency").
 		Preload("Completions").
-		Preload("Completions.CompletedBy").
 		Preload("Residence").
 		Where("residence_id IN ? AND is_archived = ?", residenceIDs, false).
 		Order("due_date ASC NULLS LAST, priority_id DESC, created_at DESC").