docs: 优化审查提示词，禁止 subagent 读取文件，明确 apply 阶段不动主规范

config.yaml: subagent 限定为计算密集/多步骤任务，文件读取用 Read 工具
prompt-proposal-review.md: 收集阶段加入读取约束和分步策略，复核补全待澄清清单
prompt-apply-review.md: 禁止同步主规范，新增 Spec 覆盖完整性扫描与补充流程

tests/server/checker/engine.test.ts

@@ -165,6 +165,8 @@ describe("ProbeEngine", () => {
       return originalExecute(target, ctx);
     };
 
+    const originalWarn = console.warn;
+    console.warn = () => undefined;
     try {
       const rejectTarget = makeCommandTarget("reject-cmd");
       const goodTarget = makeCommandTarget("good-cmd");
@@ -192,6 +194,7 @@ describe("ProbeEngine", () => {
       expect(results[1]!["targetId"]).toBe("good-cmd");
       expect(results[1]!["matched"]).toBe(true);
     } finally {
+      console.warn = originalWarn;
       checker.execute = originalExecute;
     }
   });