[moz] feat(prompt): L0~L2 prompt improvements

- L0 wiki-rule: 扩充检索路径（practices/concepts/docs/design/）+ 检索方式（index→summary→grep→full）
- L1 SOUL.md: 同步测试 + PR 审查（代码改动检查设计文档+测试脚本，PR/CI/CD 三重把关）
- L1 AGENTS.md: 新增测试规范段（生产隔离/残留清理/测试开发分离）
- L2 prompt_composer: 新增 DeliveryChecklistSection（executor/mail/toolchain handler 注册）
- 456 passed, 0 failed

src/daemon/task_handler.py

@@ -10,7 +10,7 @@ from pathlib import Path
 from typing import Dict, Optional
 
 from src.daemon.base_task_handler import BaseTaskHandler, VerifyResult
-from src.daemon.prompt_composer import PromptComposer, PromptContext, GiteaConventionSection, WikiGuideSection
+from src.daemon.prompt_composer import PromptComposer, PromptContext, GiteaConventionSection, WikiGuideSection, DeliveryChecklistSection
 from src.blackboard.db import get_connection
 
 logger = logging.getLogger("moziplus-v2.handler")
@@ -315,6 +315,7 @@ class TaskHandler(BaseTaskHandler):
             TaskConstraintsSection(),
             GiteaConventionSection(),
             WikiGuideSection(),
+            DeliveryChecklistSection(),
         ]
 
     def build_prompt(self, context: PromptContext) -> str: