feat: 匠厂数据管理展示元数据规范——元数据表初始化/校验、display_order 契约、文档与测试

tests/test_db_smoke.py

@@ -10,12 +10,20 @@ from _support import IsolatedDataRoot
 class TestDbSmoke(unittest.TestCase):
     def test_init_db_idempotent_and_crud_smoke(self) -> None:
         with IsolatedDataRoot():
-            from db.connection import init_db
             from db import task_logs_repository as tlr
+            from db.connection import get_conn, init_db
 
             init_db()
             init_db()  # 幂等
 
+            conn = get_conn()
+            try:
+                cur = conn.cursor()
+                cur.execute("SELECT display_name FROM _jiangchang_tables WHERE table_name = 'task_logs'")
+                self.assertEqual(cur.fetchone()[0], "任务日志")
+            finally:
+                conn.close()
+
             new_id = tlr.save_task_log(
                 task_type="demo_task",
                 target_id="tgt-1",