Short -n node names (no dot) now silently returned nothing because the
PuppetDB certname filter needs a FQDN. Auto-qualify a dotless name to
<name>.<domain> (domain defaults to main.unkin.net) before the query.
- Add qualifyNode() pure helper: dotless names get .<domain> appended;
names already containing a dot (any domain) are left unchanged; a single
trailing dot is stripped; empty input is preserved.
- Apply it to the -n value and to stdin-sourced node names in run().
- Make the domain configurable via config key domain, NODE_LOOKUP_DOMAIN
env var, and --domain flag (default main.unkin.net).
- Surface domain in config show / config init and document in AGENTS.md.
- Add table-driven qualifyNode tests and a domain env-override test.
unkin-agent