feat: Quota enforcement UI and various improvements

- Add quota limit warnings to Resources, Services, and OwnerScheduler pages
- Add quotaUtils.ts for checking quota limits
- Update BusinessLayout with quota context
- Improve email receiver logging
- Update serializers

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

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

frontend/src/types.ts

@@ -148,6 +148,8 @@ export interface Resource {
   userId?: string;
   maxConcurrentEvents: number;
   savedLaneCount?: number; // Remembered lane count when multilane is disabled
+  created_at?: string; // Used for quota overage calculation (oldest archived first)
+  is_archived_by_quota?: boolean; // True if archived due to quota overage
 }
 
 export type AppointmentStatus = 'PENDING' | 'CONFIRMED' | 'COMPLETED' | 'CANCELLED' | 'NO_SHOW';
@@ -205,6 +207,8 @@ export interface Service {
   description: string;
   displayOrder: number;
   photos?: string[];
+  created_at?: string; // Used for quota overage calculation (oldest archived first)
+  is_archived_by_quota?: boolean; // True if archived due to quota overage
 }
 
 export interface Metric {