refactor: expect 类型模型重构，Raw/Resolved 双层分离与断言基础设施内聚

- 重命名 ContentRules→ContentExpectations, KeyValueExpect→KeyedExpectations
- 新增 Raw/Resolved 双层模型：resolve 阶段物化为执行计划，store 持久化 Raw 快照
- HTTP body 按需读取：status/headers 失败或无 body expectation 时不读取 body
- 新增 displayValueExpectation() 解包 failure.expected 用户可读展示
- 修复 checkEarlyTimeout 独立 lte/lt 检查，修复 KeyedExpectations JSON Schema
- 新增 expect/value.ts(resolve/check/display)、keyed.ts、content.ts、headers.ts、status.ts
- 删除旧 normalize.ts/matcher.ts/validate-matcher.ts/key-value.ts
- 更新 DEVELOPMENT.md：expect 五层管线表、displayValueExpectation、1.7↔1.10 交叉引用
- 同步 13 个 main specs，归档 refactor-expect-type-model 变更（62/62 tasks）

tests/server/checker/runner/udp/execute.test.ts

@@ -1,7 +1,13 @@
 import { describe, expect, it } from "bun:test";
 
-import type { ResolvedUdpTarget, UdpExpectConfig } from "../../../../../src/server/checker/runner/udp/types";
+import type {
+  RawUdpExpectConfig,
+  ResolvedUdpExpectConfig,
+  ResolvedUdpTarget,
+} from "../../../../../src/server/checker/runner/udp/types";
 
+import { resolveContentExpectations } from "../../../../../src/server/checker/expect/content";
+import { resolveValueExpectation } from "../../../../../src/server/checker/expect/value";
 import { UdpChecker } from "../../../../../src/server/checker/runner/udp/execute";
 
 async function createEchoServer(): Promise<{ close: () => void; port: number }> {
@@ -27,14 +33,26 @@ function makeSignal(timeoutMs: number): { cleanup: () => void; signal: AbortSign
   return { cleanup: () => clearTimeout(timer), signal: controller.signal };
 }
 
-function makeTarget(overrides: Partial<ResolvedUdpTarget["udp"]> = {}, expect?: UdpExpectConfig): ResolvedUdpTarget {
+function makeTarget(overrides: Partial<ResolvedUdpTarget["udp"]> = {}, raw?: RawUdpExpectConfig): ResolvedUdpTarget {
+  const resolvedExpect: ResolvedUdpExpectConfig | undefined = raw
+    ? {
+        durationMs: resolveValueExpectation(raw.durationMs),
+        responded: raw.responded ?? true,
+        response: resolveContentExpectations(raw.response),
+        responseSize: resolveValueExpectation(raw.responseSize),
+        sourceHost: resolveValueExpectation(raw.sourceHost),
+        sourcePort: resolveValueExpectation(raw.sourcePort),
+      }
+    : undefined;
+
   return {
     description: null,
-    expect,
+    expect: resolvedExpect,
     group: "default",
     id: "test-udp",
     intervalMs: 30000,
     name: null,
+    rawExpect: raw,
     timeoutMs: 10000,
     type: "udp",
     udp: {
@@ -322,6 +340,8 @@ describe("UdpChecker resolve", () => {
     expect(target.udp.encoding).toBe("text");
     expect(target.udp.responseEncoding).toBe("text");
     expect(target.udp.maxResponseBytes).toBe(4096);
+    expect(target.rawExpect).toBeUndefined();
+    expect(target.expect).toEqual({ responded: true });
   });
 
   it("should use defaults.udp for missing fields", () => {