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）

src/server/checker/runner/udp/execute.ts

@@ -2,10 +2,17 @@ import { isError } from "es-toolkit";
 
 import type { CheckResult, RawTargetConfig } from "../../types";
 import type { CheckerContext, CheckerDefinition, CheckerValidationInput, ResolveContext } from "../types";
-import type { ResolvedUdpTarget, UdpDefaultsConfig, UdpExpectConfig, UdpTargetConfig } from "./types";
+import type {
+  RawUdpExpectConfig,
+  ResolvedUdpExpectConfig,
+  ResolvedUdpTarget,
+  UdpDefaultsConfig,
+  UdpTargetConfig,
+} from "./types";
 
+import { resolveContentExpectations } from "../../expect/content";
 import { errorFailure } from "../../expect/failure";
-import { checkValueMatcher } from "../../expect/matcher";
+import { checkValueExpectation, resolveValueExpectation } from "../../expect/value";
 import { parseSize } from "../../utils";
 import { decodePayload, encodeResponse } from "./encoding";
 import { checkResponded, checkResponseSize, checkResponseText, checkSourceHost, checkSourcePort } from "./expect";
@@ -111,7 +118,7 @@ export class UdpChecker implements CheckerDefinition<ResolvedUdpTarget> {
           };
         }
 
-        const durationResult = checkValueMatcher(durationMs, expect?.durationMs, {
+        const durationResult = checkValueExpectation(durationMs, expect?.durationMs, {
           message: "durationMs mismatch",
           path: "durationMs",
           phase: "duration",
@@ -255,7 +262,7 @@ export class UdpChecker implements CheckerDefinition<ResolvedUdpTarget> {
         }
       }
 
-      const durationResult = checkValueMatcher(durationMs, expect?.durationMs, {
+      const durationResult = checkValueExpectation(durationMs, expect?.durationMs, {
         message: "durationMs mismatch",
         path: "durationMs",
         phase: "duration",
@@ -305,13 +312,26 @@ export class UdpChecker implements CheckerDefinition<ResolvedUdpTarget> {
       t.udp.maxResponseBytes ?? udpDefaults?.maxResponseBytes ?? DEFAULT_MAX_RESPONSE_BYTES,
     );
 
+    const rawExpect = target.expect as RawUdpExpectConfig | undefined;
+    const resolvedExpect: ResolvedUdpExpectConfig = rawExpect
+      ? {
+          durationMs: resolveValueExpectation(rawExpect.durationMs),
+          responded: rawExpect.responded ?? true,
+          response: resolveContentExpectations(rawExpect.response),
+          responseSize: resolveValueExpectation(rawExpect.responseSize),
+          sourceHost: resolveValueExpectation(rawExpect.sourceHost),
+          sourcePort: resolveValueExpectation(rawExpect.sourcePort),
+        }
+      : { responded: true };
+
     return {
       description: null,
-      expect: target.expect as UdpExpectConfig | undefined,
+      expect: resolvedExpect,
       group: target.group ?? "default",
       id: t.id,
       intervalMs: context.defaultIntervalMs,
       name: t.name ?? null,
+      rawExpect,
       timeoutMs: context.defaultTimeoutMs,
       type: "udp",
       udp: {