feat: M4 seed — upload & publish 20 rule sets, fix config/schema column names

- Fix _export_settings for pydantic v2 compatibility (model_fields)
- Fix delete_time→deleted_at, update_time→updated_at in RuleServiceImpl
- Add OssClient.EnsureBucket method
- Replace contract_lease/sale/tech rules.yaml from new-rules
- Seed script: batch upload 20 rule YAMLs to OSS + write DB + publish
- Config: fix OSS import chain

fastapi_admin/config/__init__.py

@@ -19,15 +19,25 @@ from ._settings import app, jwt, db, redis, oss, llm, vlm, ocr, leaudit as _leau
 def _export_settings(instance: object, prefix: str = "") -> dict[str, object]:
     """将 Settings 实例的所有字段和 @property 导出为模块级变量。"""
     result: dict[str, object] = {}
+
+    # pydantic v2 model_fields
+    model_fields = getattr(instance, "model_fields", None)
+    if isinstance(model_fields, dict):
+        for key in model_fields:
+            if key.startswith("_"):
+                continue
+            result[key] = getattr(instance, key)
+
+    # @property 和普通属性
     for key in dir(type(instance)):
-        if key.startswith("_"):
+        if key.startswith("_") or key in result:
             continue
-        value = getattr(instance, key, None)
-        if callable(value) and not isinstance(value, property):
+        attr = getattr(type(instance), key, None)
+        if attr is None:
             continue
-        if isinstance(value, property):
-            value = value.__get__(instance)
-        result[key] = value
+        if isinstance(attr, property):
+            result[key] = attr.__get__(instance)
+
     return result