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/shared/keyed.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, test } from "bun:test";
+
+import { checkKeyedExpectations, resolveKeyedExpectations } from "../../../../../src/server/checker/expect/keyed";
+
+describe("KeyedExpectations", () => {
+  test("resolve 将 Raw Record 转为保持顺序的有序数组", () => {
+    expect(resolveKeyedExpectations({ Count: { gte: 1 }, Name: "alice" })).toEqual([
+      { key: "Count", matcher: { gte: 1 } },
+      { key: "Name", matcher: { equals: "alice" } },
+    ]);
+  });
+
+  test("failure.path 包含基础路径和原始 key", () => {
+    const result = checkKeyedExpectations(
+      { "content-type": "text/plain" },
+      resolveKeyedExpectations({ "Content-Type": { contains: "json" } }),
+      { normalizeKey: (key) => key.toLowerCase(), path: "headers", phase: "headers" },
+    );
+
+    expect(result.matched).toBe(false);
+    expect(result.failure?.path).toBe("headers.Content-Type");
+  });
+
+  test("DB rows 默认保持大小写敏感匹配", () => {
+    const expectations = resolveKeyedExpectations({ Name: "alice", name: "bob" });
+
+    expect(
+      checkKeyedExpectations({ Name: "alice", name: "bob" }, expectations, { path: "rows[0]", phase: "rows" }).matched,
+    ).toBe(true);
+    expect(
+      checkKeyedExpectations({ Name: "bob", name: "alice" }, expectations, { path: "rows[0]", phase: "rows" }).matched,
+    ).toBe(false);
+  });
+});