Add ETA estimation to cluster backup/restore operations

- Created internal/progress/estimator.go with ETAEstimator component
- Tracks elapsed time and estimates remaining time based on progress
- Enhanced Spinner and LineByLine indicators to display ETA info
- Integrated into BackupCluster and RestoreCluster functions
- Display format: 'Operation | X/Y (Z%) | Elapsed: Xm | ETA: ~Ym remaining'
- Preserves spinner animation while showing progress/time estimates
- Quick Win approach: no historical data storage, just current operation tracking
This commit is contained in:
2025-11-07 13:28:11 +00:00
parent ebb77fb960
commit b3ac5a18df
17 changed files with 233 additions and 24 deletions

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