The household-timezone change added an eleventh setting (timezone) and
made the API's household-local dates derive from it. Update the admin
routes' settings, missed-sweep and occurrence-preview docstrings and
core/sweep.py's docstrings to say so (empty timezone falls back to
host local). Documentation only; no behaviour change.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>