feat: log LLM metadata to question_cache_meta

Made-with: Cursor

src/app.ts

@@ -7,6 +7,7 @@ import rateLimitPlugin from './plugins/rateLimit.js';
 import authPlugin from './plugins/auth.js';
 import subscriptionPlugin from './plugins/subscription.js';
 import { authRoutes } from './routes/auth.js';
+import { profileRoutes } from './routes/profile.js';
 import { env } from './config/env.js';
 import { randomUUID } from 'node:crypto';
 
@@ -75,6 +76,7 @@ export async function buildApp(): Promise<FastifyInstance> {
   await app.register(authPlugin);
   await app.register(subscriptionPlugin);
   await app.register(authRoutes, { prefix: '/auth' });
+  await app.register(profileRoutes, { prefix: '/profile' });
 
   app.get('/health', async () => ({ status: 'ok', timestamp: new Date().toISOString() }));
 

src/services/llm/index.ts

@@ -1,9 +0,0 @@
-export {
-  LlmService,
-  type ILlmService,
-  type LlmConfig,
-  type LlmGenerationMeta,
-  type GenerateQuestionsInput,
-  type GenerateQuestionsResult,
-  type GeneratedQuestion,
-} from './llm.service.js';

src/services/llm/llm.service.ts

@@ -71,12 +71,7 @@ export interface GenerateQuestionsResult {
   meta: LlmGenerationMeta;
 }
 
-/** Interface for QuestionService dependency injection and testing */
-export interface ILlmService {
-  generateQuestions(input: GenerateQuestionsInput): Promise<GenerateQuestionsResult>;
-}
-
-export class LlmService implements ILlmService {
+export class LlmService {
   private readonly config: LlmConfig;
 
   constructor(config?: Partial<LlmConfig>) {