feat(learner): progress, notes and exercise attempt API

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/feature-learner/src/server/feature.ts

@@ -5,6 +5,7 @@ import { json } from "./http";
 import { adminRoutes } from "./admin";
 import { libraryRoutes } from "./catalog";
 import { lessonRoutes } from "./lesson";
+import { userDataRoutes } from "./userdata";
 
 /**
  * The learner feature: auth, library, reader, notes, progress and exercises.
@@ -26,6 +27,7 @@ export function learnerFeature(ctx: ServerContext): Feature & { auth: AuthServic
     ...adminRoutes(ctx, auth.service.invalidate),
     ...libraryRoutes(ctx),
     ...lessonRoutes(ctx),
+    ...userDataRoutes(ctx),
   };
   // Every handler waits for the learner migrations (a no-op once Phase 2 runs them in migrate()).
   for (const methods of Object.values(routes)) {