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_common/fastapi_common_storage/oss_client.py

@@ -144,6 +144,18 @@ class OssClient:
             TempFile.write(Content)
             return TempFile.name
 
+    def EnsureBucket(self, Bucket: str | None = None) -> str:
+        """确保 bucket 存在，不存在则创建。返回 bucket 名。"""
+        TargetBucket = Bucket or self.bucket
+        Client = self._GetMinioClient()
+        from minio import Minio
+        try:
+            if not Client.bucket_exists(TargetBucket):
+                Client.make_bucket(TargetBucket)
+        except Minio.S3Error:
+            pass
+        return TargetBucket
+
     def ObjectExists(self, Source: str, Bucket: str | None = None) -> bool:
         """判断对象是否存在。"""
         Ref = self.ResolveObjectRef(Source=Source, Bucket=Bucket)