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

src/server/checker/runner/udp/execute.ts

@@ -2,11 +2,10 @@ import { isError } from "es-toolkit";
 
 import type { CheckResult, RawTargetConfig } from "../../types";
 import type { CheckerContext, CheckerDefinition, CheckerValidationInput, ResolveContext } from "../types";
-import type { RawUdpExpectConfig, ResolvedUdpExpectConfig, ResolvedUdpTarget, UdpTargetConfig } from "./types";
+import type { ResolvedUdpExpectConfig, ResolvedUdpTarget, UdpTargetConfig } from "./types";
 
-import { resolveContentExpectations } from "../../expect/content";
 import { errorFailure } from "../../expect/failure";
-import { checkValueExpectation, resolveValueExpectation } from "../../expect/value";
+import { checkValueExpectation } from "../../expect/value";
 import { parseSize } from "../../utils";
 import { decodePayload, encodeResponse } from "./encoding";
 import { checkResponded, checkResponseSize, checkResponseText, checkSourceHost, checkSourcePort } from "./expect";
@@ -303,15 +302,11 @@ export class UdpChecker implements CheckerDefinition<ResolvedUdpTarget> {
     const responseEncoding = t.udp.responseEncoding ?? "text";
     const maxResponseBytes = parseSize(t.udp.maxResponseBytes ?? DEFAULT_MAX_RESPONSE_BYTES);
 
-    const rawExpect = target.expect as RawUdpExpectConfig | undefined;
-    const resolvedExpect: ResolvedUdpExpectConfig = rawExpect
+    const expect = target.expect as ResolvedUdpExpectConfig | undefined;
+    const resolvedExpect: ResolvedUdpExpectConfig = expect
       ? {
-          durationMs: resolveValueExpectation(rawExpect.durationMs),
-          responded: rawExpect.responded ?? true,
-          response: resolveContentExpectations(rawExpect.response),
-          responseSize: resolveValueExpectation(rawExpect.responseSize),
-          sourceHost: resolveValueExpectation(rawExpect.sourceHost),
-          sourcePort: resolveValueExpectation(rawExpect.sourcePort),
+          ...expect,
+          responded: expect.responded ?? true,
         }
       : { responded: true };
 
@@ -322,7 +317,6 @@ export class UdpChecker implements CheckerDefinition<ResolvedUdpTarget> {
       id: t.id,
       intervalMs: context.defaultIntervalMs,
       name: t.name ?? null,
-      rawExpect,
       timeoutMs: context.defaultTimeoutMs,
       type: "udp",
       udp: {