The tracker doc said labels that don't exist are created on first use.
They aren't: `tea issues create --labels` and `issues edit --add-labels`
silently drop unknown names (the command succeeds, the issue stays
unlabelled) — observed filing #151/#152 while the repo had no labels.
Document creating them with `tea labels create` and checking the result.
The five triage labels now exist on the server; the wayfinder:* family
still has to be created before first use.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>