fix: OSS URL store object key only, not absolute path

- OssClient.UploadBytes/UploadText now return object key (relative path)
- Add OssClient.BuildObjectKey method as canonical key builder
- OssClient.BuildObjectUrl preserved for direct-link scenarios
- OssPathUtils.BuildRuleYamlKey/BuildRuleValidationReportKey accept Region
- DB migration: convert 20 existing absolute URLs to object keys

fastapi_common/fastapi_common_storage/oss_client.py

@@ -73,7 +73,7 @@ class OssClient:
             length=len(Content),
             content_type=ContentType,
         )
-        return self.BuildObjectUrl(ObjectKey=ObjectKey, Bucket=TargetBucket)
+        return self.BuildObjectKey(ObjectKey)
 
     def UploadText(
         self,
@@ -174,12 +174,22 @@ class OssClient:
             return False
 
     def BuildObjectUrl(self, ObjectKey: str, Bucket: str | None = None) -> str:
-        """构造对象访问地址。"""
+        """构造对象访问地址（绝对 URL — 仅用于需要直链的场景）。
+
+        Prefer :meth:`BuildObjectKey` for stored references.
+        """
         TargetBucket = Bucket or self.bucket
         if self.baseUrl:
             return f"{self.baseUrl}/{TargetBucket}/{ObjectKey.lstrip('/')}"
         return f"oss://{TargetBucket}/{ObjectKey.lstrip('/')}"
 
+    def BuildObjectKey(self, ObjectKey: str) -> str:
+        """返回规范化的 object key（相对路径，不包含 bucket/host）。
+
+        这是推荐的存储格式——不含协议和主机名，迁移 OSS 实例时无需更新数据库。
+        """
+        return ObjectKey.lstrip("/")
+
     def PresignGetUrl(self, Source: str, Bucket: str | None = None) -> str:
         """生成对象下载签名 URL。"""
         Ref = self.ResolveObjectRef(Source=Source, Bucket=Bucket)