feat: 配置变量系统与 target id/name 双字段标识

- 新增顶层 variables 段支持 string/number/boolean 字面量
- target 字符串字段支持 、、{...} 转义语法
- 变量解析优先级: variables -> process.env -> 默认值 -> 报错
- 完整引用保留原始类型，部分引用拼接为字符串
- 变量替换在 YAML 解析后、AJV 校验前执行
- 替换仅作用于 targets，跳过 id/type 字段
- target 新增必填 id 字段作为唯一标识，name 改为可选展示名称
- 数据库存储/API/前端全面迁移到 id 标识
- 统一 checker 运行时类型检查为 es-toolkit predicates
- 同步 delta specs 到主 specs，归档 config-variables 变更

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

@@ -11,7 +11,7 @@ describe("validateDbConfig", () => {
   test("缺少 db.url 返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ name: "test", type: "db" }],
+      targets: [{ id: "test", name: "test", type: "db" }],
     });
     expect(result.length).toBeGreaterThan(0);
     const dbError = result.find((e) => e.path.includes("db"));
@@ -22,7 +22,7 @@ describe("validateDbConfig", () => {
   test("db.url 为空字符串返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { url: "" }, name: "test", type: "db" }],
+      targets: [{ db: { url: "" }, id: "test", name: "test", type: "db" }],
     });
     const urlError = result.find((e) => e.path.includes("db.url"));
     expect(urlError).toBeDefined();
@@ -32,7 +32,7 @@ describe("validateDbConfig", () => {
   test("db.query 为空字符串返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { query: "", url: "sqlite://:memory:" }, name: "test", type: "db" }],
+      targets: [{ db: { query: "", url: "sqlite://:memory:" }, id: "test", name: "test", type: "db" }],
     });
     const queryError = result.find((e) => e.path.includes("db.query"));
     expect(queryError).toBeDefined();
@@ -42,7 +42,7 @@ describe("validateDbConfig", () => {
   test("db 分组未知字段返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { timeout: 5, url: "sqlite://:memory:" }, name: "test", type: "db" }],
+      targets: [{ db: { timeout: 5, url: "sqlite://:memory:" }, id: "test", name: "test", type: "db" }],
     });
     const unknownError = result.find((e) => e.path.includes("db.timeout"));
     expect(unknownError).toBeDefined();
@@ -52,7 +52,15 @@ describe("validateDbConfig", () => {
   test("expect.maxDurationMs 非数字返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { url: "sqlite://:memory:" }, expect: { maxDurationMs: "invalid" }, name: "test", type: "db" }],
+      targets: [
+        {
+          db: { url: "sqlite://:memory:" },
+          expect: { maxDurationMs: "invalid" },
+          id: "test",
+          name: "test",
+          type: "db",
+        },
+      ],
     });
     const durationError = result.find((e) => e.path.includes("expect.maxDurationMs"));
     expect(durationError).toBeDefined();
@@ -62,7 +70,9 @@ describe("validateDbConfig", () => {
   test("expect.rowCount 非法 operator 返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { url: "sqlite://:memory:" }, expect: { rowCount: { foo: 1 } }, name: "test", type: "db" }],
+      targets: [
+        { db: { url: "sqlite://:memory:" }, expect: { rowCount: { foo: 1 } }, id: "test", name: "test", type: "db" },
+      ],
     });
     const rowCountError = result.find((e) => e.path.includes("expect.rowCount"));
     expect(rowCountError).toBeDefined();
@@ -72,7 +82,9 @@ describe("validateDbConfig", () => {
   test("expect.rows 不是数组返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { url: "sqlite://:memory:" }, expect: { rows: "not-array" }, name: "test", type: "db" }],
+      targets: [
+        { db: { url: "sqlite://:memory:" }, expect: { rows: "not-array" }, id: "test", name: "test", type: "db" },
+      ],
     });
     const rowsError = result.find((e) => e.path.includes("expect.rows"));
     expect(rowsError).toBeDefined();
@@ -82,7 +94,9 @@ describe("validateDbConfig", () => {
   test("expect.rows 元素不是对象返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { url: "sqlite://:memory:" }, expect: { rows: ["not-object"] }, name: "test", type: "db" }],
+      targets: [
+        { db: { url: "sqlite://:memory:" }, expect: { rows: ["not-object"] }, id: "test", name: "test", type: "db" },
+      ],
     });
     const rowError = result.find((e) => e.path.includes("expect.rows[0]"));
     expect(rowError).toBeDefined();
@@ -96,6 +110,7 @@ describe("validateDbConfig", () => {
         {
           db: { url: "sqlite://:memory:" },
           expect: { rows: [{ name: { match: "[invalid" } }] },
+          id: "test",
           name: "test",
           type: "db",
         },
@@ -109,7 +124,7 @@ describe("validateDbConfig", () => {
   test("expect 未知字段返回错误", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ db: { url: "sqlite://:memory:" }, expect: { status: [200] }, name: "test", type: "db" }],
+      targets: [{ db: { url: "sqlite://:memory:" }, expect: { status: [200] }, id: "test", name: "test", type: "db" }],
     });
     const unknownError = result.find((e) => e.path.includes("expect.status"));
     expect(unknownError).toBeDefined();
@@ -123,6 +138,7 @@ describe("validateDbConfig", () => {
         {
           db: { query: "SELECT 1", url: "sqlite://:memory:" },
           expect: { maxDurationMs: 5000, rowCount: { gte: 1 }, rows: [{ cnt: { gte: 1 } }] },
+          id: "test",
           name: "test",
           type: "db",
         },
@@ -134,7 +150,7 @@ describe("validateDbConfig", () => {
   test("忽略非 db 类型 target", () => {
     const result = validateDbConfig({
       defaults: {},
-      targets: [{ name: "test", type: "http" }],
+      targets: [{ id: "test", name: "test", type: "http" }],
     });
     expect(result).toHaveLength(0);
   });
@@ -143,8 +159,8 @@ describe("validateDbConfig", () => {
     const result = validateDbConfig({
       defaults: {},
       targets: [
-        { db: { url: "sqlite://:memory:" }, name: "db1", type: "db" },
-        { db: { url: "" }, name: "db2", type: "db" },
+        { db: { url: "sqlite://:memory:" }, id: "db1", name: "db1", type: "db" },
+        { db: { url: "" }, id: "db2", name: "db2", type: "db" },
       ],
     });
     expect(result.length).toBeGreaterThan(0);