bug: cold project open hangs on external volumes during bootstrap

[codeg-dev]

Description

On macOS, opening a project from an external volume can hang for several seconds on the first request after a cold opencode serve start.

This shows up most clearly on /Volumes/* paths where two slow operations land in the request path:

• git rev-list --max-parents=0 HEAD
• FileWatcher.init() waiting on parcel-watcher subscribe

OpenCode version

1.14.17

Steps to reproduce

1. Start opencode serve on macOS.
2. Open a git project from /Volumes/....
3. Hit GET /project/current?directory=<external-project> after a cold restart.
4. Observe multi-second delay before the response returns.

Operating System

macOS 26.4.1

Terminal

Ghostty