feat(service): P6.3 route REST + approve/deny → execute to sandbox

RouteService (createBinding/listBindings/simulate/listDecisions/approve/deny/
execute/flushDigest); approve REVIEW→ALLOW + route.approved event → execute via
P5 OutboundService (sandbox, idempotent per decision); deny never executes.
7 route endpoints; PORTAL adapter registered. 5 route tests green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/iios-service/src/app.module.ts

@@ -9,6 +9,7 @@ import { MessageModule } from './messaging/message.module';
 import { InboxModule } from './inbox/inbox.module';
 import { SupportModule } from './support/support.module';
 import { AdaptersModule } from './adapters/adapters.module';
+import { RoutingModule } from './routing/routing.module';
 import { HealthController } from './health.controller';
 import { DevController } from './dev/dev.controller';
 
@@ -24,6 +25,7 @@ import { DevController } from './dev/dev.controller';
     InboxModule,
     SupportModule,
     AdaptersModule,
+    RoutingModule,
   ],
   controllers: [HealthController, DevController],
 })