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

src/server/checker/runner/llm/schema.ts

@@ -3,8 +3,9 @@ import { Type } from "@sinclair/typebox";
 import type { CheckerSchemas } from "../types";
 
 import {
-  createHeaderExpectSchema,
-  createPureOperatorSchema,
+  createContentRulesSchema,
+  createKeyValueExpectSchema,
+  createValueMatcherSchema,
   statusCodePatternSchema,
   stringMapSchema,
 } from "../../schema/fragments";
@@ -25,36 +26,6 @@ function createLlmOptionsSchema() {
   );
 }
 
-function createLlmOutputRulesSchema() {
-  return Type.Array(
-    Type.Object(
-      {
-        contains: Type.Optional(Type.String()),
-        equals: Type.Optional(Type.String()),
-        json: Type.Optional(
-          Type.Object({ path: Type.String(), ...operatorProperties() }, { additionalProperties: false }),
-        ),
-        regex: Type.Optional(Type.String()),
-      },
-      { additionalProperties: false },
-    ),
-  );
-}
-
-function operatorProperties() {
-  return {
-    contains: Type.Optional(Type.String()),
-    empty: Type.Optional(Type.Boolean()),
-    equals: Type.Optional(Type.Number()),
-    exists: Type.Optional(Type.Boolean()),
-    gt: Type.Optional(Type.Number()),
-    gte: Type.Optional(Type.Number()),
-    lt: Type.Optional(Type.Number()),
-    lte: Type.Optional(Type.Number()),
-    match: Type.Optional(Type.String()),
-  };
-}
-
 export const llmCheckerSchemas: CheckerSchemas = {
   config: Type.Object(
     {
@@ -84,17 +55,17 @@ export const llmCheckerSchemas: CheckerSchemas = {
   ),
   expect: Type.Object(
     {
-      finishReason: Type.Optional(Type.String()),
-      headers: Type.Optional(createHeaderExpectSchema()),
-      maxDurationMs: Type.Optional(Type.Number({ minimum: 0 })),
-      output: Type.Optional(createLlmOutputRulesSchema()),
-      rawFinishReason: Type.Optional(Type.String()),
+      durationMs: Type.Optional(createValueMatcherSchema()),
+      finishReason: Type.Optional(createValueMatcherSchema()),
+      headers: Type.Optional(createKeyValueExpectSchema()),
+      output: Type.Optional(createContentRulesSchema()),
+      rawFinishReason: Type.Optional(createValueMatcherSchema()),
       status: Type.Optional(Type.Array(statusCodePatternSchema)),
       stream: Type.Optional(
         Type.Object(
           {
             completed: Type.Optional(Type.Boolean()),
-            firstTokenMs: Type.Optional(createPureOperatorSchema()),
+            firstTokenMs: Type.Optional(createValueMatcherSchema()),
           },
           { additionalProperties: false },
         ),
@@ -102,9 +73,9 @@ export const llmCheckerSchemas: CheckerSchemas = {
       usage: Type.Optional(
         Type.Object(
           {
-            inputTokens: Type.Optional(createPureOperatorSchema()),
-            outputTokens: Type.Optional(createPureOperatorSchema()),
-            totalTokens: Type.Optional(createPureOperatorSchema()),
+            inputTokens: Type.Optional(createValueMatcherSchema()),
+            outputTokens: Type.Optional(createValueMatcherSchema()),
+            totalTokens: Type.Optional(createValueMatcherSchema()),
           },
           { additionalProperties: false },
         ),