TUI: Add timing and ETA tracking to cluster restore progress

- Add DatabaseProgressWithTimingCallback for timing-aware progress reporting
- Track elapsed time and average duration per database during restore phase
- Display ETA based on completed database restore times
- Show restore phase elapsed time in progress bar
- Enhance cluster restore progress bar with [elapsed / ETA: remaining] format

bin/README.md

@@ -4,8 +4,8 @@ This directory contains pre-compiled binaries for the DB Backup Tool across mult
 
 ## Build Information
 - **Version**: 3.42.34
-- **Build Time**: 2026-01-15_14:33:12_UTC
-- **Git Commit**: 09a9177
+- **Build Time**: 2026-01-15_17:50:35_UTC
+- **Git Commit**: 4938dc1
 
 ## Recent Updates (v1.1.0)
 - ✅ Fixed TUI progress display with line-by-line output