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/schema.ts

@@ -2,7 +2,11 @@ import { Type } from "@sinclair/typebox";
 
 import type { CheckerSchemas } from "../types";
 
-import { createContentRulesSchema, createValueMatcherSchema, sizeSchema } from "../../schema/fragments";
+import {
+  createRawContentExpectationsSchema,
+  createRawValueExpectationSchema,
+  sizeSchema,
+} from "../../schema/fragments";
 
 export const udpCheckerSchemas: CheckerSchemas = {
   config: Type.Object(
@@ -26,12 +30,12 @@ export const udpCheckerSchemas: CheckerSchemas = {
   ),
   expect: Type.Object(
     {
-      durationMs: Type.Optional(createValueMatcherSchema()),
+      durationMs: Type.Optional(createRawValueExpectationSchema()),
       responded: Type.Optional(Type.Boolean()),
-      response: Type.Optional(createContentRulesSchema()),
-      responseSize: Type.Optional(createValueMatcherSchema()),
-      sourceHost: Type.Optional(createValueMatcherSchema()),
-      sourcePort: Type.Optional(createValueMatcherSchema()),
+      response: Type.Optional(createRawContentExpectationsSchema()),
+      responseSize: Type.Optional(createRawValueExpectationSchema()),
+      sourceHost: Type.Optional(createRawValueExpectationSchema()),
+      sourcePort: Type.Optional(createRawValueExpectationSchema()),
     },
     { additionalProperties: false },
   ),