- 新增 §2.4 AiJobService.createJob 幂等流程(findUnique + insert + P2002 catch) - §3.1 队列配置对齐 Issue #288:ai-interactive attempts=2, backoff=2000ms;ai-background concurrency=1, backoff=5000ms - 新增设计理由说明与原始规格的偏差原因 Co-Authored-By: Claude <noreply@anthropic.com>