feat: agent session management — metrics, channels, dispose (P2-006) (#78)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/gateway/src/agent/agent.module.ts

@@ -3,13 +3,14 @@ import { AgentService } from './agent.service.js';
 import { ProviderService } from './provider.service.js';
 import { RoutingService } from './routing.service.js';
 import { ProvidersController } from './providers.controller.js';
+import { SessionsController } from './sessions.controller.js';
 import { CoordModule } from '../coord/coord.module.js';
 
 @Global()
 @Module({
   imports: [CoordModule],
   providers: [ProviderService, RoutingService, AgentService],
-  controllers: [ProvidersController],
+  controllers: [ProvidersController, SessionsController],
   exports: [AgentService, ProviderService, RoutingService],
 })
 export class AgentModule {}