Remove summary from list API responses

Summary statistics are now calculated client-side from kanban data.
This removes the summary field from MyResidencesResponse and
KanbanBoardResponse. Mutation endpoints still return summary via
WithSummaryResponse<T> for immediate cache updates.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/dto/responses/residence.go

@@ -64,9 +64,9 @@ type TotalSummary struct {
 }
 
 // MyResidencesResponse represents the response for my-residences endpoint
+// NOTE: Summary statistics are calculated client-side from kanban data
 type MyResidencesResponse struct {
 	Residences []ResidenceResponse `json:"residences"`
-	Summary    TotalSummary        `json:"summary"`
 }
 
 // ResidenceWithSummaryResponse wraps ResidenceResponse with TotalSummary for CRUD operations