feat(club-003): club POS integration: identify member and register cashback from sales

project/src/modules/pos/api/pos.routes.ts

@@ -1433,6 +1433,8 @@ export async function registerPosRoutes(app: FastifyInstance, deps: PosRouteDeps
             payments: { type: 'array', minItems: 0, items: { type: 'object' } },
             customerId: { type: 'string', format: 'uuid' },
             posLabel: { type: 'string', maxLength: 100 },
+            /** Club member UUID — if provided and sale completes, cashback is accumulated. */
+            clubMemberId: { type: 'string', format: 'uuid' },
           },
         },
         response: {
@@ -1485,6 +1487,7 @@ export async function registerPosRoutes(app: FastifyInstance, deps: PosRouteDeps
           payments: z.array(payment).min(0),
           customerId: z.string().uuid().optional(),
           posLabel: z.string().max(100).optional(),
+          clubMemberId: z.string().uuid().optional(),
         }),
         request.body ?? {},
       );