Fix lfs migration (#32812) (#32818)

Backport #32812 by @hiifong

Fix: #32803

![image](https://github.com/user-attachments/assets/3ea1f4e0-e26f-4a15-957e-dd6caf91deb1)

![image](https://github.com/user-attachments/assets/44b99624-c347-4f2d-a11c-13ec1276eea2)

Co-authored-by: hiifong <i@hiif.ong>

modules/lfs/http_client.go

@@ -211,6 +211,7 @@ func createRequest(ctx context.Context, method, url string, headers map[string]s
 		req.Header.Set(key, value)
 	}
 	req.Header.Set("Accept", AcceptHeader)
+	req.Header.Set("User-Agent", UserAgentHeader)
 
 	return req, nil
 }

modules/lfs/shared.go

@@ -15,7 +15,8 @@ const (
 	// MediaType contains the media type for LFS server requests
 	MediaType = "application/vnd.git-lfs+json"
 	// Some LFS servers offer content with other types, so fallback to '*/*' if application/vnd.git-lfs+json cannot be served
-	AcceptHeader = "application/vnd.git-lfs+json;q=0.9, */*;q=0.8"
+	AcceptHeader    = "application/vnd.git-lfs+json;q=0.9, */*;q=0.8"
+	UserAgentHeader = "git-lfs"
 )
 
 // BatchRequest contains multiple requests processed in one batch operation.