0.28.0

Changed — may break callers

• models download <model> replaces models text download (cli-core 0.405.0 → 0.406.0). The old spelling is
  refused, with no alias; the hint cli-core prints for a missing search model already names models download.
  images models download keeps its name. Shared command paths and flags now accept only their canonical
  spelling, and a saved permission key with a renamed path stops with configuration_error naming its replacement.