Start crew members concurrently instead of sequentially. Previously,
`gt crew start --all` could hang for minutes because each crew member
was started one at a time, with each waiting up to 60 seconds for
Claude to initialize.
With parallel startup, all crew members start simultaneously and
the total wait time is bounded by the slowest individual startup.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
cb2b130ca2