feat: 重构配置生命周期为 Authoring/Normalized/Resolved 三层

将变量替换和 expect 简写展开统一放入 Normalized 阶段，
运行时 AJV 使用 Normalized schema，导出 schema 面向 Authoring Config。

主要变更：
- 新增 normalizer.ts 实现 normalizeAuthoringConfig()
- 拆分 Authoring/Normalized 双 schema，checker 接口支持 authoring/normalized 片段
- config-loader 流程：normalize → Normalized AJV → semantic → resolve
- validator 兼容层自动分派 raw/normalized expect 形态
- 删除 rawExpect，store.expect 列写入 null
- Authoring schema 对 integer/boolean/enum 字段接受变量引用
- 修复 DB/HTTP validate 入口守卫和 LLM options integer 变量引用
- 优化 compact() 避免 undefined 覆盖隐患
- 移除 content.ts 恒为 true 的前置条件
- 同步 5 个主规范并归档 change

tests/server/checker/config-contract/validate.test.ts

@@ -84,6 +84,69 @@ describe("config contract", () => {
     expect(validate(target({ equals: { status: "ok" } }))).toBe(true);
   });
 
+  test("Authoring schema 接受变量引用，Normalized schema 拒绝变量引用和 primitive 简写", () => {
+    const ajv = new Ajv({
+      allErrors: true,
+      coerceTypes: false,
+      removeAdditional: false,
+      strict: true,
+      useDefaults: false,
+    });
+    const registry = createDefaultCheckerRegistry();
+    const authoring = ajv.compile(createProbeConfigJsonSchema(registry));
+    const normalizedConfig = {
+      targets: [
+        {
+          expect: { durationMs: 5000 },
+          http: { maxRedirects: "${MAX|5}", url: "https://example.com" },
+          id: "api",
+          type: "http",
+        },
+      ],
+    };
+
+    expect(
+      authoring({
+        targets: [
+          {
+            expect: { durationMs: 5000, status: ["${STATUS}"] },
+            http: { ignoreSSL: "${SSL|false}", maxRedirects: "${MAX|5}", url: "https://example.com" },
+            id: "api",
+            type: "http",
+          },
+        ],
+      }),
+    ).toBe(false);
+    expect(
+      authoring({
+        targets: [
+          {
+            expect: { durationMs: 5000 },
+            http: {
+              ignoreSSL: "${SSL|false}",
+              maxRedirects: "${MAX|5}",
+              method: "${METHOD|GET}",
+              url: "https://example.com",
+            },
+            id: "api",
+            type: "http",
+          },
+          {
+            id: "llm-api",
+            llm: {
+              model: "gpt-4o-mini",
+              prompt: "ping",
+              provider: "${P|openai}",
+              url: "https://example.com/v1/chat/completions",
+            },
+            type: "llm",
+          },
+        ],
+      }),
+    ).toBe(true);
+    expect(validateProbeConfigContract(normalizedConfig, registry).config).toBeNull();
+  });
+
   test("导出 schema 拒绝 KeyedExpectations 的数组和对象简写", () => {
     const ajv = new Ajv({
       allErrors: true,
@@ -144,4 +207,71 @@ describe("config contract", () => {
 
     expect(message).toBe('target "api" 的 http.extra 是未知字段\ntarget "api" 的 expect.body[0].regex 正则不合法');
   });
+
+  test("Authoring schema 接受 server.listen.port、llm.options.maxOutputTokens 变量引用", () => {
+    const ajv = new Ajv({
+      allErrors: true,
+      coerceTypes: false,
+      removeAdditional: false,
+      strict: true,
+      useDefaults: false,
+    });
+    const validate = ajv.compile(createProbeConfigJsonSchema(createDefaultCheckerRegistry()));
+
+    expect(
+      validate({
+        server: { listen: { port: "${SERVER_PORT|3000}" } },
+        targets: [
+          {
+            id: "llm",
+            llm: {
+              model: "gpt-4o-mini",
+              options: { maxOutputTokens: "${MAX_TOKENS|100}" },
+              prompt: "ping",
+              provider: "openai",
+              url: "https://example.com/v1/chat/completions",
+            },
+            type: "llm",
+          },
+        ],
+      }),
+    ).toBe(true);
+  });
+
+  test("Authoring schema 拒绝 expect.status 和 expect.exitCode 数组内的变量引用", () => {
+    const ajv = new Ajv({
+      allErrors: true,
+      coerceTypes: false,
+      removeAdditional: false,
+      strict: true,
+      useDefaults: false,
+    });
+    const validate = ajv.compile(createProbeConfigJsonSchema(createDefaultCheckerRegistry()));
+
+    expect(
+      validate({
+        targets: [
+          {
+            expect: { status: ["${STATUS}"] },
+            http: { url: "https://example.com" },
+            id: "http",
+            type: "http",
+          },
+        ],
+      }),
+    ).toBe(false);
+
+    expect(
+      validate({
+        targets: [
+          {
+            cmd: { exec: "true" },
+            expect: { exitCode: ["${CODE}"] },
+            id: "cmd",
+            type: "cmd",
+          },
+        ],
+      }),
+    ).toBe(false);
+  });
 });