feat(HEL-382): 搭建 datahub 底座和盘后正式数据链路

新增独立 xiaobai-datahub 服务（SQLite WAL、Tushare 盘后发布、/v1 契约和管理后台），不改现站页面与数据链路。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

xiaobai-datahub/tests/test_layout.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+import unittest
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+class LayoutTests(unittest.TestCase):
+    def test_dockerfile_and_compose_exist(self) -> None:
+        self.assertTrue((ROOT / "Dockerfile").is_file())
+        self.assertTrue((ROOT / "compose.yaml").is_file())
+        self.assertTrue((ROOT / "requirements.txt").read_text(encoding="utf-8").startswith("cryptography=="))
+        dockerfile = (ROOT / "Dockerfile").read_text(encoding="utf-8")
+        self.assertIn("10002", dockerfile)
+        self.assertIn("8766", dockerfile)
+        self.assertIn("livez", dockerfile)
+
+    def test_reserved_adapters_present(self) -> None:
+        from datahub.adapters import RESERVED
+
+        for name in ("eastmoney", "tencent", "ths", "xgb", "akshare", "ifind"):
+            self.assertIn(name, RESERVED)
+            probe = RESERVED[name].probe()
+            self.assertEqual(probe["state"], "reserved")
+            self.assertFalse(probe["configured"])
+
+
+if __name__ == "__main__":
+    unittest.main()