When a launchd service is uninstalled via bootout, macOS marks it as
disabled in /var/db/com.apple.xpc.launchd/disabled.*.plist. This persists
across reboots and plist recreation. Future bootstrap calls fail with
error 5 (I/O error) because the service is still marked disabled.
Fix: Call 'launchctl enable' before 'launchctl bootstrap' to clear the
disabled state, matching the fix already applied to the macOS Swift app
in GatewayLaunchAgentManager.swift.
Related: #306
d51a9ebb0e