[tasks] minor fixes

Author: capcom6

internal/server/tasks/dto.go

@@ -65,7 +65,7 @@ type TaskCreateRequest struct {
 	ProjectSlug string  `json:"project_slug"          validate:"required,max=255"`
 	Title       string  `json:"title"                 validate:"required,max=255"`
 	Description string  `json:"description,omitempty" validate:"max=10000"`
-	Priority    string  `json:"priority,omitempty"                                             enums:"Trivial,Minor,Major,Critical,Blocker"`
+	Priority    string  `json:"priority,omitempty"    validate:"omitempty,oneof=Trivial Minor Major Critical Blocker"`
 	AssigneeID  *int64  `json:"assignee_id,omitempty" validate:"omitempty,min=1"`
 	DueDate     *string `json:"due_date,omitempty"    validate:"omitempty,datetime=2006-01-02"`
 }