CCM-10893 Add routing feature flag

Author: nicki-nhs

lambdas/backend-client/src/schemas/client.ts

@@ -5,6 +5,7 @@ import { ClientConfiguration, ClientFeatures } from '../types/generated';
 const $ClientFeatures = schemaFor<ClientFeatures>()(
   z.object({
     proofing: z.boolean(),
+    routing: z.boolean(),
   })
 );