feat: add file size to log-metrics

[fukusuket]

What Changed

• Closed Add evtx file size to csv output result of log-metrics command #1528

Evidence

Integration-Test

• https://github.com/Yamato-Security/hayabusa/actions/runs/12301549273

I would appreciate it if you could check it out when you have time🙏

[fukusuket]

% ./hayabusa log-metrics -d ../all-evtx/Logs_Win11 -q -o metrics.csv
Start time: 2024/12/13 02:21
Total event log files: 355
Total file size: 1.8 GB

Currently scanning for log metrics. Please wait.

[00:00:16] 355 / 355   [========================================] 100%

Scanning finished.
                                                                                                                                               Saved results: metrics.csv (20.7 KB)

Elapsed time: 00:00:16.121

[YamatoSecurity]

@fukusuket LGTM! Thanks so much!