refactor: 统一 expect 断言体系，引入共享 ValueMatcher/ContentRules/KeyValueExpect 模型

- 引入共享 ValueMatcher（equals/contains/regex/exists/empty/gt/gte/lt/lte）
- 引入共享 ContentRules 数组（direct/json/css/xpath 提取器）
- 引入共享 KeyValueExpect（动态键值断言，字面量等价 equals）
- maxDurationMs → durationMs: ValueMatcher（所有 checker）
- match → regex（固定无 flags）
- Ping max* → packetLossPercent/avgLatencyMs/maxLatencyMs（ValueMatcher）
- LLM finishReason/rawFinishReason → ValueMatcher
- DB 新增 result: ContentRules
- TCP banner → ContentRules 数组
- 删除旧模块：operator.ts、validate-operator.ts、duration.ts、body.ts、text.ts、output.ts
- 更新全部 checker schema/validate/expect/execute
- 更新 probe-config.schema.json、probes.example.yaml
- 更新 README.md、DEVELOPMENT.md（含 expect 字段选择规范）
- 同步 10 个 delta specs 到主 specs，归档 change

tests/server/checker/runner/tcp/validate.test.ts

@@ -68,7 +68,7 @@ describe("validateTcpConfig", () => {
     const issues = validateTcpConfig(
       makeInput([
         {
-          expect: { banner: { contains: "ESMTP" } },
+          expect: { banner: [{ contains: "ESMTP" }] },
           id: "t1",
           tcp: { host: "127.0.0.1", port: 25 },
           type: "tcp",
@@ -82,7 +82,7 @@ describe("validateTcpConfig", () => {
     const issues = validateTcpConfig(
       makeInput([
         {
-          expect: { banner: { contains: "ESMTP" } },
+          expect: { banner: [{ contains: "ESMTP" }] },
           id: "t1",
           tcp: { host: "127.0.0.1", port: 25, readBanner: true },
           type: "tcp",
@@ -106,18 +106,18 @@ describe("validateTcpConfig", () => {
     expect(issues.some((i) => i.path.includes("connected"))).toBe(true);
   });
 
-  test("expect maxDurationMs 非数字", () => {
+  test("expect durationMs 非 matcher", () => {
     const issues = validateTcpConfig(
       makeInput([
         {
-          expect: { maxDurationMs: "slow" },
+          expect: { durationMs: "slow" },
           id: "t1",
           tcp: { host: "127.0.0.1", port: 80 },
           type: "tcp",
         },
       ]),
     );
-    expect(issues.some((i) => i.path.includes("maxDurationMs"))).toBe(true);
+    expect(issues.some((i) => i.path.includes("durationMs"))).toBe(true);
   });
 
   test("expect 未知字段", () => {
@@ -134,11 +134,11 @@ describe("validateTcpConfig", () => {
     expect(issues.some((i) => i.message.includes("未知字段"))).toBe(true);
   });
 
-  test("expect.banner match 正则非法", () => {
+  test("expect.banner regex 正则非法", () => {
     const issues = validateTcpConfig(
       makeInput([
         {
-          expect: { banner: { match: "[invalid" } },
+          expect: { banner: [{ regex: "[invalid" }] },
           id: "t1",
           tcp: { host: "127.0.0.1", port: 25, readBanner: true },
           type: "tcp",