feat: combo ticket 50/50 split + Best of Creation museum

- Combo tickets (matching multiple museums) split revenue/visits evenly
- Each museum gets its own row tagged with TicketType=combo, ComboWith
- Added Best of Creation (متحف خير الخلق) to museum mapping
- Holy Quraan Museum now shows 3.3M total (was 971K without combo share)
- ComboMuseums column tracks split factor for auditing

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/types.ts

@@ -20,6 +20,9 @@ export interface AggregatedRecord {
   Date: string;
   MuseumName: string;
   Channel: string;
+  TicketType: 'single' | 'combo';
+  ComboMuseums: number;
+  ComboWith: string;
   Visits: number;
   Tickets: number;
   GrossRevenue: number;