fix(M-AI-05): correct createJob return type — result.id not result.job.id

AiJobCreationService.createJob() returns AiJob entity directly,
not wrapped in { job: {...} }.

Build error: TS2339 Property 'job' does not exist on type AiJob.
Fixed: result.job.id → result.id (lines 135, 141).

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

src/modules/ai-analysis/feynman-execution-router.ts

@@ -132,13 +132,13 @@ export class FeynmanExecutionRouter {
     });
 
     this.logger.log(
-      `Feynman Unified: jobId=${result.job.id} userId=${userId} ` +
+      `Feynman Unified: jobId=${result.id} userId=${userId} ` +
       `submissionId=${submissionId} idempotencyKey=${idempotencyKey}`,
     );
 
     // 8. 返回兼容响应（不删除旧字段，新增可选字段）
     return {
-      jobId: result.job.id,
+      jobId: result.id,
       status: 'queued',
       engineMode: 'unified',
       lifecycleStatus: 'queued',