The ~30s groupBy over 9.7M GisFeature rows ran synchronously on the first
/api/eterra/uats call after every redeploy (in-memory cache), freezing the
UAT autocomplete right when users reload post-deploy. Counts only feed the
decorative 'N local' badge — return the (possibly empty) cache immediately
and refresh in the background, single-flight so concurrent cold requests
don't stack 30s queries.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude VM
f7468b23c2