fix: re-detect databases at execution time for cluster cleanup

- Detection in preview may fail or return stale results
- Re-detect user databases when cleanup is enabled at execution time
- Fall back to preview list if re-detection fails
- Ensures actual databases are dropped, not just what was detected earlier

bin/README.md

@@ -4,8 +4,8 @@ This directory contains pre-compiled binaries for the DB Backup Tool across mult
 
 ## Build Information
 - **Version**: 3.42.50
-- **Build Time**: 2026-01-17_15:45:53_UTC
-- **Git Commit**: e363e19
+- **Build Time**: 2026-01-17_15:54:39_UTC
+- **Git Commit**: 9396c8e
 
 ## Recent Updates (v1.1.0)
 - ✅ Fixed TUI progress display with line-by-line output