Add logs for part upload

mobile/lib/module/upload/service/multipart.dart

@@ -187,7 +187,9 @@ class MultiPartUploader {
       final isLastPart = i == partsLength - 1;
       final fileSize =
           isLastPart ? encryptedFile.lengthSync() % partSize : partSize;
-
+      _logger.info(
+        "Uploading part ${i + 1} / $partsLength of size $fileSize bytes (total size ${encryptedFile.lengthSync()}).",
+      );
       final response = await _s3Dio.put(
         partURL,
         data: encryptedFile.openRead(

mobile/lib/utils/file_uploader.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
+import "dart:developer" as dev;
 import 'dart:io';
 import 'dart:math' as math;
 
@@ -576,6 +577,7 @@ class FileUploader {
         final fileUploadURL = await _getUploadURL();
         fileObjectKey = await _putFile(fileUploadURL, encryptedFile);
       } else {
+        dev.log("Init multipartUpload $multipartEntryExists", name: "Uploader");
         if (multipartEntryExists) {
           fileObjectKey = await _multiPartUploader.putExistingMultipartFile(
             encryptedFile,