Fix: App freezes when opening files when the number of Pin items exceeds the maximum

[NghiaTranUIT]

🐶 Brief

If we drag the local file to Proxyman, and the total exceeds the maximum of free version. The app is hang due to the Semaphore lock is waiting forever. It was a hack to for async barrier run on async mode.

👑 Criteria

• Remove the dangerous Semaphore lock
• Replace with sync barrier

[NghiaTranUIT]

All done 👍