feat: 初始化高校人事请假考勤技能 (process-leave-attendance-default)

基于 skill-template 脚手架开发，包含：
- 5 张业务表（教职工、请假政策、考勤日历、请假记录、假期余额）
- 请假核算引擎（扣薪计算、审批层级判定、年假抵扣）
- CLI 入口（import-employees / calculate-leave / render-html）
- HTML 审批与扣薪报告生成
- 示例数据与完整测试套件（295 tests passed）

tests/test_entrypoint_subprocess.py

@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+"""通过 subprocess 调用 ``python scripts/main.py``，验证真实入口（非仅 import main）。"""
+from __future__ import annotations
+
+import json
+import os
+import subprocess
+import sys
+import unittest
+
+from _support import IsolatedDataRoot, get_skill_root
+
+import importlib.metadata as metadata
+
+from jiangchang_skill_core import version_ge
+from util.constants import PLATFORM_KIT_MIN_VERSION
+
+
+def _platform_kit_meets_template_minimum() -> bool:
+    try:
+        installed = metadata.version("jiangchang-platform-kit")
+    except metadata.PackageNotFoundError:
+        return False
+    return version_ge(installed, PLATFORM_KIT_MIN_VERSION)
+
+
+def _run_main(args: list[str], timeout: int = 15) -> subprocess.CompletedProcess[str]:
+    root = get_skill_root()
+    main_py = os.path.join(root, "scripts", "main.py")
+    env = os.environ.copy()
+    env.setdefault("PYTHONIOENCODING", "utf-8")
+    env["PYTHONDONTWRITEBYTECODE"] = "1"
+    return subprocess.run(
+        [sys.executable, main_py, *args],
+        cwd=root,
+        env=env,
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
+        errors="replace",
+        timeout=timeout,
+    )
+
+
+class TestEntrypointSubprocess(unittest.TestCase):
+    @unittest.skipUnless(
+        _platform_kit_meets_template_minimum(),
+        f"installed jiangchang-platform-kit below template minimum {PLATFORM_KIT_MIN_VERSION}",
+    )
+    def test_health_exit_zero(self) -> None:
+        with IsolatedDataRoot():
+            cp = _run_main(["health"])
+            self.assertEqual(cp.returncode, 0, msg=cp.stderr + cp.stdout)
+
+    def test_version_json_and_skill_slug(self) -> None:
+        with IsolatedDataRoot():
+            cp = _run_main(["version"])
+            self.assertEqual(cp.returncode, 0, msg=cp.stderr + cp.stdout)
+            payload = json.loads(cp.stdout.strip())
+            self.assertIn("version", payload)
+            self.assertIn("skill", payload)
+            from util.constants import SKILL_SLUG
+
+            self.assertEqual(payload["skill"], SKILL_SLUG)
+
+
+if __name__ == "__main__":
+    unittest.main()