Add Tahesab jewelry accounting integration with multi-DB connections.

Encrypt tokens server-side, sync customers both ways, show balances/documents on the person Assets tab, and push sanads with idempotent Factor_Code logging.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/app.module.ts

@@ -26,6 +26,7 @@ import { LoyaltyModule } from './loyalty/loyalty.module';
 import { AutomationsModule } from './automations/automations.module';
 import { AiModule } from './ai/ai.module';
 import { MemoryModule } from './memory/memory.module';
+import { TahesabModule } from './integrations/tahesab/tahesab.module';
 
 @Module({
   imports: [
@@ -59,6 +60,7 @@ import { MemoryModule } from './memory/memory.module';
     LoyaltyModule,
     AutomationsModule,
     MemoryModule,
+    TahesabModule,
   ],
 })
 export class AppModule {}