v3.42.31: Add schollz/progressbar for visual progress display

- Visual progress bars for cloud uploads/downloads
  - Byte transfer display, speed, ETA prediction
  - Color-coded Unicode block progress
- Checksum verification with progress bar for large files
- Spinner for indeterminate operations (unknown size)
- New types: NewSchollzBar(), NewSchollzBarItems(), NewSchollzSpinner()
- Progress Writer() method for io.Copy integration

bin/README.md

@@ -3,9 +3,9 @@
 This directory contains pre-compiled binaries for the DB Backup Tool across multiple platforms and architectures.
 
 ## Build Information
-- **Version**: 3.42.10
-- **Build Time**: 2026-01-14_14:49:15_UTC
-- **Git Commit**: 8c85d85
+- **Version**: 3.42.30
+- **Build Time**: 2026-01-14_14:59:20_UTC
+- **Git Commit**: 7b4ab76
 
 ## Recent Updates (v1.1.0)
 - ✅ Fixed TUI progress display with line-by-line output