Add transport-neutral routing and stream contracts

src/app.ts

@@ -1,5 +1,6 @@
 import { Config } from './services/config.ts';
 import { Database, MigrationService } from './services/storage/index.ts';
+import { ApplicationRouter } from './services/router.ts';
 import { Logger } from './utils/logger.ts';
 
 /** Application composition root. */
@@ -17,12 +18,22 @@ export class App {
         const migrations = new MigrationService(database, debug);
         await migrations.migrateToLatest();
 
-        return new App(database);
+        const routes = [];
+
+        // Route loading is an explicit startup phase, not first-request work.
+        // ApplicationRouter.create validates every path and rejects duplicates
+        // before any client can connect.
+        const router = await ApplicationRouter.create(routes);
+
+        return new App(database, router);
     }
 
     private stopPromise: Promise<void> | undefined;
 
-    constructor(private readonly database: Database) {}
+    constructor(
+        private readonly database: Database,
+        private readonly router: ApplicationRouter,
+    ) {}
 
     async start(): Promise<void> {}