Clean up progress bar text and fix verbose logging visibility

🎯 PROGRESS BAR TEXT CLEANUP:

✅ REMOVED REDUNDANT PART INFO:
  • Before: 'Uploading Win10ISO.zip - 1.75 GB/4.57 GB (Part 34/74) at 18.28 MB/s'
  • After: 'Uploading Win10ISO.zip - 1.75 GB/4.57 GB at 18.28 MB/s'
  • Cleaner display - part info is already visible in individual chunk bars

🔧 FIXED VERBOSE LOGGING VISIBILITY:

✅ IMMEDIATE PROCESSING OF START MESSAGES:
  • Added ProcessQueuedUpdates() after task creation loop
  • 'Starting upload' messages now appear immediately
  • All parts now show start messages, not just first 4

 ENHANCED LOGGING COVERAGE:
   Removed 32MB threshold - now logs all chunk starts
   Better visibility into parallel upload activity
   Shows all concurrent uploads as they begin

 EXPECTED VERBOSE OUTPUT:
  VERBOSE: Starting upload of part 1/74 (64.00 MB)
  VERBOSE: Starting upload of part 2/74 (64.00 MB)
  VERBOSE: Starting upload of part 3/74 (64.00 MB)
  VERBOSE: Starting upload of part 4/74 (64.00 MB)
  VERBOSE: Starting upload of part 5/74 (64.00 MB)
  ... (continues for all parts as they start)

 PROGRESS BAR HIERARCHY:
  Multipart Upload Collection: Processing Win10ISO.zip [] 50%
   File Upload: Uploading Win10ISO.zip - 2.28 GB/4.57 GB at 45.2 MB/s [] 50%
       Uploading Chunk: Part 35 of 74 - 32.1 MB/64.0 MB [] 50%
       Uploading Chunk: Part 36 of 74 - 45.2 MB/64.0 MB [] 70%
       Uploading Chunk: Part 37 of 74 - 12.8 MB/64.0 MB [] 20%

Perfect balance of clean UI and comprehensive logging!

src/Core/S3/MultipartUploadManager.cs

@@ -136,12 +136,9 @@ namespace PSMinIO.Core.S3
                             };
                             parts.TryAdd(partNum, partInfo);
 
-                            // Log chunk start (not too verbose - only for larger chunks)
-                            if (partSize >= 32 * 1024 * 1024) // Log for chunks >= 32MB
-                            {
-                                _progressCollector.QueueVerboseMessage("Starting upload of part {0}/{1} ({2})",
-                                    partNum, totalParts, SizeFormatter.FormatBytes(partSize));
-                            }
+                            // Log chunk start for all chunks (provides better visibility)
+                            _progressCollector.QueueVerboseMessage("Starting upload of part {0}/{1} ({2})",
+                                partNum, totalParts, SizeFormatter.FormatBytes(partSize));
 
                             // Update status to transferring
                             partInfo.Status = PartStatus.Transferring;
@@ -164,7 +161,7 @@ namespace PSMinIO.Core.S3
                             // Update file progress (Layer 2) with intelligent size formatting
                             var sizeDisplay = SizeFormatter.FormatBytesIntelligent(currentUploaded, totalSize);
                             _progressCollector.QueueProgressUpdate(2, "File Upload",
-                                $"Uploading {fileInfo.Name} - {sizeDisplay} (Part {partNum}/{totalParts}) at {SizeFormatter.FormatSpeed(speed)}",
+                                $"Uploading {fileInfo.Name} - {sizeDisplay} at {SizeFormatter.FormatSpeed(speed)}",
                                 (int)fileProgress, 1);
 
                             // Log completion for larger chunks or milestone parts
@@ -201,6 +198,9 @@ namespace PSMinIO.Core.S3
                     uploadTasks.Add(uploadTask);
                 }
 
+                // Process initial "starting upload" messages immediately
+                _progressCollector.ProcessQueuedUpdates();
+
                 // Wait for all uploads to complete with periodic progress updates
                 var allTasks = uploadTasks.ToArray();
                 while (!Task.WaitAll(allTasks, 1000)) // Wait 1 second at a time