refactor: 将 memory checker 重命名为 mem

- 类型标识符 memory → mem
- 类名 MemoryChecker → MemChecker
- 内部类型名统一 Memory* → Mem*
- 内部函数名统一 *Memory* → *Mem*
- 目录重命名 memory/ → mem/（源码、测试、文档）
- 配置键 memory: → mem:
- 重新生成 probe-config.schema.json
- 保留中文"内存"用户提示

破坏性变更：无向后兼容

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

@@ -0,0 +1,87 @@
+import { describe, expect, test } from "bun:test";
+
+import type { RawTargetConfig } from "../../../../../src/server/checker/types";
+
+import { validateMemConfig } from "../../../../../src/server/checker/runner/mem/validate";
+
+function validate(target: RawTargetConfig) {
+  return validateMemConfig({ targets: [target] });
+}
+
+describe("validateMemConfig", () => {
+  test("有效配置无错误", () => {
+    expect(validate({ id: "mem-test", mem: {}, type: "mem" })).toEqual([]);
+  });
+
+  test("缺少 mem 配置分组", () => {
+    const issues = validate({ id: "mem-test", type: "mem" });
+    expect(issues.some((i) => i.path.endsWith("mem") && i.code === "required")).toBe(true);
+  });
+
+  test("mem 未知字段报错", () => {
+    const issues = validate({ id: "mem-test", mem: { extra: true }, type: "mem" });
+    expect(issues.some((i) => i.path.endsWith("extra") && i.code === "unknown-field")).toBe(true);
+  });
+
+  test("expect 未知字段报错", () => {
+    const issues = validate({ expect: { logicalCoreCount: { gte: 4 } }, id: "mem-test", mem: {}, type: "mem" });
+    expect(issues.some((i) => i.path.endsWith("logicalCoreCount") && i.code === "unknown-field")).toBe(true);
+  });
+
+  test("expect 合法 ValueMatcher 通过", () => {
+    const issues = validate({
+      expect: { usagePercent: { lte: 85 }, usedBytes: { lte: 8589934592 } },
+      id: "mem-test",
+      mem: {},
+      type: "mem",
+    });
+    expect(issues.filter((i) => i.path.includes("expect"))).toEqual([]);
+  });
+
+  test("expect 非法 ValueMatcher 报错", () => {
+    const issues = validate({ expect: { usagePercent: [1, 2] }, id: "mem-test", mem: {}, type: "mem" });
+    expect(issues.some((i) => i.path.includes("usagePercent"))).toBe(true);
+  });
+
+  test("expect 合法字节大小字符串通过", () => {
+    const issues = validate({ expect: { usedBytes: "512MB" }, id: "mem-test", mem: {}, type: "mem" });
+    expect(issues.filter((i) => i.path.includes("usedBytes"))).toEqual([]);
+  });
+
+  test("expect 非法字节大小字符串报错", () => {
+    const issues = validate({ expect: { usedBytes: "abc" }, id: "mem-test", mem: {}, type: "mem" });
+    expect(issues.some((i) => i.path.includes("usedBytes") && i.message.includes("字节大小"))).toBe(true);
+  });
+
+  test("expect 所有合法字段通过", () => {
+    const issues = validate({
+      expect: {
+        activeBytes: { lte: 8589934592 },
+        activePercent: { lte: 80 },
+        availableBytes: { gte: 4294967296 },
+        availablePercent: { gte: 20 },
+        buffcacheBytes: { lte: 2147483648 },
+        durationMs: { lte: 5000 },
+        freeBytes: { gte: 2147483648 },
+        freePercent: { gte: 15 },
+        swapFreeBytes: { gte: 0 },
+        swapTotalBytes: { lte: 4294967296 },
+        swapUsagePercent: { lte: 50 },
+        swapUsedBytes: { lte: 2147483648 },
+        totalBytes: { equals: 17179869184 },
+        usagePercent: { lte: 85 },
+        usedBytes: { lte: 8589934592 },
+        usedPercent: { lte: 90 },
+      },
+      id: "mem-test",
+      mem: {},
+      type: "mem",
+    });
+    expect(issues).toEqual([]);
+  });
+
+  test("非 mem type 的 target 不校验", () => {
+    const issues = validate({ id: "other-test", type: "http" });
+    expect(issues).toEqual([]);
+  });
+});