[macos] Process crashed without error

Watcher process suddenly died after running okay for weeks (last commit, from terminal). Lost 2h of data.

Last messages:

```
2024-02-14 11:50:18 [aw-watcher-window-macos] [DEBUG] [heartbeat] bucket: aw-watcher-window_erb-m2.localdomain, timestamp: 2024-02-14 10:50:18 +0000, pulsetime: 1.7, app: Alacritty, title: [0:mono-gpt-engineer] ~/P/m/app (/Users/erb/Programming/mono-gpt-engineer/app), url:
2024-02-14 11:50:18 [aw-watcher-window-macos] [DEBUG] sending old heartbeat for merging
2024-02-14 11:50:23 [DEBUG]: queue path '/Users/erb/Library/Application Support/activitywatch/aw-client/queued/aw-watcher-window.v1.persistqueue' (aw_client.client:418)
⏎
```

Exit code 0.