feat: force file sync while uploading file (#5668)

http/tus_handlers.go

@@ -256,6 +256,12 @@ func tusPatchHandler() handleFunc {
 			return http.StatusInternalServerError, fmt.Errorf("could not write to file: %w", err)
 		}
 
+		// Sync the file to ensure all data is written to storage
+		// to prevent file corruption.
+		if err := openFile.Sync(); err != nil {
+			return http.StatusInternalServerError, fmt.Errorf("could not sync file: %w", err)
+		}
+
 		newOffset := uploadOffset + bytesWritten
 		w.Header().Set("Upload-Offset", strconv.FormatInt(newOffset, 10))