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/web/constants/target-table-columns.test.ts

@@ -103,7 +103,7 @@ describe("createTargetTableColumns", () => {
   test("延迟列超过 9999ms 时显示上限文案", () => {
     const latencyColumn = getColumn(createTargetTableColumns(["http"]), "latestCheck.durationMs");
     const renderCell = latencyColumn.cell as (params: PrimaryTableCellParams<TargetStatus>) => {
-      props: { children: string; className: string };
+      props: { children: string[]; className: string };
     };
     const element = renderCell({
       col: latencyColumn,
@@ -133,7 +133,7 @@ describe("createTargetTableColumns", () => {
   test("延迟列正常值包含 ms 单位", () => {
     const latencyColumn = getColumn(createTargetTableColumns(["http"]), "latestCheck.durationMs");
     const renderCell = latencyColumn.cell as (params: PrimaryTableCellParams<TargetStatus>) => {
-      props: { children: string; className: string };
+      props: { children: string[]; className: string };
     };
     const element = renderCell({
       col: latencyColumn,