Before: `guestWaitForSSHFunc` loops forever bounded only by context
cancellation, so if sshd fails to start in the guest `vm run` hangs
indefinitely — which burned a long debugging session during the
golden-image bring-up.
After: the ssh wait gets its own 90s deadline. On guest-side timeout
the error names the VM, explains sshd is the likely suspect, points
at `banger vm logs <name>` for the console output, and notes the VM
is still alive for inspection (or `vm delete` to clean up). Parent
context cancellation (Ctrl-C, caller timeout) still surfaces as-is
without the hint.
`vmRunSSHTimeout` is a var rather than a const so tests can shrink
it; the new TestRunVMRunSSHTimeoutReturnsActionableError sets it to
50ms and asserts the error message contains the actionable bits.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Thales Maciel
3aa64a63c1