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/runner/registry.test.ts

@@ -14,8 +14,14 @@ function createChecker(type: string): Checker {
     execute: () => Promise.resolve<CheckResult>({} as unknown as CheckResult),
     resolve: () => ({}) as unknown as ResolvedTargetBase,
     schemas: {
-      config: Type.Object({}, { additionalProperties: false }),
-      expect: Type.Object({}, { additionalProperties: false }),
+      authoring: {
+        config: Type.Object({}, { additionalProperties: false }),
+        expect: Type.Object({}, { additionalProperties: false }),
+      },
+      normalized: {
+        config: Type.Object({}, { additionalProperties: false }),
+        expect: Type.Object({}, { additionalProperties: false }),
+      },
     },
     serialize: () => ({ config: "", target: "" }),
     type,
@@ -68,7 +74,9 @@ describe("CheckerRegistry", () => {
 
     expect(first.supportedTypes).toEqual(["http", "cmd", "db", "tcp", "icmp", "udp", "llm", "custom"]);
     expect(second.supportedTypes).toEqual(["http", "cmd", "db", "tcp", "icmp", "udp", "llm"]);
-    expect(first.definitions.every((checker) => checker.schemas.config && checker.schemas.expect)).toBe(true);
+    expect(
+      first.definitions.every((checker) => checker.schemas.authoring.config && checker.schemas.normalized.expect),
+    ).toBe(true);
   });
 
   test("默认 registry 注册 icmp type", () => {