history_for() now enumerates run dirs' results.json, groups by recipe, sorts
newest-first by finished timestamp (mixed numeric+named ids — timestamp is the
only correct key), caps at HISTORY_CAP=30, skips malformed/empty/no-recipe dirs.
Overview + badges + /runs + security guards + stdlib-only unchanged.
Local verify: 13/13 unit tests; full-fixture vs 308 real results.json →
bluesky-pds=8 in exact ts order, plausible capped 30 newest, edge dirs skipped.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
