Items were keyed `{repo}#{pr}`, e.g. `netcracker/interview#29`. Both
characters break the UI's item route: the `/` in `owner/repo` splits into
extra path segments, and everything after the `#` is a fragment the browser
never sends. Items were created successfully and then 404'd when opened.
Ids are now `{owner}__{repo}__pr{n}`, which needs no percent-encoding. The
real repo and pr stay intact in `input`, so nothing downstream reads the id
back apart. Session ids elsewhere keep the `{repo}#{pr}` form — those are
never path segments and feedback_scores depends on that shape.
The 28 existing items were unusable and are regenerable from feedback.db;
they were deleted and recreated under the new ids.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>