Address CodeQL security alert by using the user's known_hosts file
for SSH host key verification when available. Falls back to accepting
any key only when known_hosts doesn't exist (common in containerized
or ephemeral environments).
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Fix fmt.Sprintf format verb error in ssh.go (remove unused stat command)
- Fix errcheck warnings by explicitly ignoring best-effort operations
- Fix ineffassign warning in cmd_ansible.go
All golangci-lint checks now pass for deploy packages.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>