The Dolt backend's SearchIssues was using a two-phase query:
1. SELECT id FROM issues WHERE ... -> collect all IDs
2. SELECT * FROM issues WHERE id IN (id1, id2, ... id8000+)
With 8000+ issues, this second query with 8000+ placeholders hammers
Dolt CPU at 100%+. The fix changes SearchIssues to select all columns
directly in the first query and scan results inline.
See: hq-ihwsj
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
