feat(M-AI-08-06): learning analysis execution router + controller wiring

- LearningAnalysisExecutionRouter: LEARNING_ANALYSIS_ENGINE_MODE flag
- Routes learning_state_analysis/weak_point_analysis/next_action_planning
- Idempotency: client key or content hash + 10min window
- Controller: 3 job types route through learningAnalysisRouter

Co-Authored-By: Claude <noreply@anthropic.com>

src/modules/ai-runtime/ai-runtime.module.ts

@@ -14,11 +14,12 @@ import { PriorityRulesService } from './priority-rules.service';
 import { SnapshotCleanupService } from './snapshot-cleanup.service';
 import { JobReaperService } from './job-reaper.service';
 import { QuizExecutionRouter } from './quiz-execution-router';
+import { LearningAnalysisExecutionRouter } from './learning-analysis-execution-router';
 
 @Module({
   imports: [ConfigModule, PrismaModule, forwardRef(() => AiJobModule)],
   controllers: [UserAiController, RuntimeInternalController],
-  providers: [UserAiService, CredentialEncryptionService, RuntimeInternalService, UserAiQuotaService, PlatformBudgetService, SnapshotBuilderService, PriorityRulesService, SnapshotCleanupService, JobReaperService, QuizExecutionRouter],
+  providers: [UserAiService, CredentialEncryptionService, RuntimeInternalService, UserAiQuotaService, PlatformBudgetService, SnapshotBuilderService, PriorityRulesService, SnapshotCleanupService, JobReaperService, QuizExecutionRouter, LearningAnalysisExecutionRouter],
   exports: [UserAiService, CredentialEncryptionService, RuntimeInternalService, UserAiQuotaService, PlatformBudgetService, SnapshotBuilderService, PriorityRulesService, SnapshotCleanupService, JobReaperService],
 })
 export class AiRuntimeModule {}

src/modules/ai-runtime/learning-analysis-execution-router.ts

@@ -0,0 +1,79 @@
+import { Injectable, Logger } from '@nestjs/common';
+import * as crypto from 'crypto';
+import { FeatureFlagService } from '../config/feature-flag.service';
+import { LearningAnalysisSnapshotBuilder } from '../ai-job/learning-analysis-snapshot-builder';
+import { AiJobCreationService } from '../ai-job/ai-job-creation.service';
+import { UserAiService } from './user-ai.service';
+import type { CreateAnalysisJobDto } from './user-ai.dto';
+
+const FLAG_NAME = 'LEARNING_ANALYSIS_ENGINE_MODE';
+
+@Injectable()
+export class LearningAnalysisExecutionRouter {
+  private readonly logger = new Logger(LearningAnalysisExecutionRouter.name);
+
+  constructor(
+    private readonly featureFlag: FeatureFlagService,
+    private readonly snapshotBuilder: LearningAnalysisSnapshotBuilder,
+    private readonly creationService: AiJobCreationService,
+    private readonly legacyService: UserAiService,
+  ) {}
+
+  async analyze(userId: string, dto: CreateAnalysisJobDto) {
+    const useUnified = await this.shouldUseUnified(userId);
+
+    if (!useUnified) {
+      this.logger.log(`LEARNING_ANALYSIS_ENGINE_MODE=legacy for userId=${userId}`);
+      return this.legacyService.createAnalysisJob(userId, dto);
+    }
+
+    this.logger.log(`LEARNING_ANALYSIS_ENGINE_MODE=unified for userId=${userId}`);
+
+    // Idempotency: client-provided key or deterministic content hash + window
+    let effectiveId: string;
+    if (dto.idempotencyKey) {
+      effectiveId = dto.idempotencyKey;
+    } else {
+      const contentKey = crypto.createHash('sha256')
+        .update([dto.targetType, dto.targetId].join('|'))
+        .digest('hex').substring(0, 24);
+      const windowTs = Math.floor(Date.now() / (10 * 60 * 1000));
+      effectiveId = `${contentKey}:w${windowTs}`;
+    }
+
+    const snapshot = await this.snapshotBuilder.build({
+      userId,
+      triggerType: 'manual',
+      operationId: effectiveId,
+    });
+
+    const idempotencyKey = `learning-analysis:manual:${effectiveId}`;
+
+    const job = await this.creationService.createJob({
+      userId,
+      jobType: 'learning_analysis',
+      triggerType: 'user_api',
+      targetType: dto.targetType,
+      targetId: dto.targetId,
+      idempotencyKey,
+      retrySnapshotContent: snapshot as unknown as Record<string, unknown>,
+    });
+
+    this.logger.log(
+      `Learning Analysis Unified: jobId=${job.id} userId=${userId} ` +
+      `targetType=${dto.targetType} targetId=${dto.targetId}`,
+    );
+
+    return {
+      jobId: job.id,
+      status: 'queued',
+      engineMode: 'unified' as const,
+      lifecycleStatus: 'queued',
+    };
+  }
+
+  private async shouldUseUnified(userId: string): Promise<boolean> {
+    try { return await this.featureFlag.isEnabled(FLAG_NAME, userId); }
+    catch (err: any) { this.logger.warn(`FeatureFlag query failed, falling back to legacy: ${err.message}`); return false; }
+  }
+}

src/modules/ai-runtime/user-ai.controller.spec.ts

@@ -39,7 +39,10 @@ describe('UserAiController', () => {
     mockQuizRouter = {
       generateQuiz: jest.fn(),
     };
-    controller = new UserAiController(mockService, mockQuizRouter);
+    const mockLearningAnalysisRouter = {
+      analyze: jest.fn(),
+    };
+    controller = new UserAiController(mockService, mockQuizRouter, mockLearningAnalysisRouter);
   });
 
   const req = (id = 'u1') => ({ user: { id } }) as any;
@@ -149,8 +152,8 @@ describe('UserAiController', () => {
       expect(result).toEqual({ jobId: 'j1', status: 'queued' });
     });
 
-    it('non-quiz jobType calls legacy service', async () => {
-      const dto = { jobType: 'learning_state_analysis', targetType: 'knowledge_base', targetId: 'kb1' };
+    it('non-quiz/non-analysis jobType calls legacy service', async () => {
+      const dto = { jobType: 'flashcard_generation', targetType: 'knowledge_base', targetId: 'kb1' };
       mockService.createAnalysisJob.mockResolvedValue({ jobId: 'j2' });
       const result = await controller.createAnalysisJob(req(), dto as any);
       expect(mockService.createAnalysisJob).toHaveBeenCalledWith('u1', dto);

src/modules/ai-runtime/user-ai.controller.ts

@@ -1,6 +1,7 @@
 import { Controller, Get, Put, Post, Delete, Param, Body, Req, Query } from '@nestjs/common';
 import { UserAiService } from './user-ai.service';
 import { QuizExecutionRouter } from './quiz-execution-router';
+import { LearningAnalysisExecutionRouter } from './learning-analysis-execution-router';
 import { SaveLearningProfileDto, UpdateAiSettingsDto, CreateCredentialDto, UpdateCredentialDto, CreateAnalysisJobDto } from './user-ai.dto';
 
 @Controller('ai')
@@ -8,6 +9,7 @@ export class UserAiController {
   constructor(
     private readonly service: UserAiService,
     private readonly quizRouter: QuizExecutionRouter,
+    private readonly learningAnalysisRouter: LearningAnalysisExecutionRouter,
   ) {}
 
   // ── Profile ──
@@ -69,6 +71,9 @@ export class UserAiController {
     if (dto.jobType === 'quiz_generation') {
       return this.quizRouter.generateQuiz(req.user.id, dto);
     }
+    if (['learning_state_analysis', 'weak_point_analysis', 'next_action_planning'].includes(dto.jobType)) {
+      return this.learningAnalysisRouter.analyze(req.user.id, dto);
+    }
     return this.service.createAnalysisJob(req.user.id, dto);
   }