chore: update Definition of Done with KNOWN-ISSUES.md and PR requirements

Added two new criteria to Definition of Done:
- KNOWN-ISSUES.md must be up to date
- If a PR exists, it must be up to date

These were added by the user to ensure bugs are properly tracked
and PRs reflect current state.

Author: dluc

CLAUDE.md

@@ -12,6 +12,8 @@
 - [ ] `format.sh` runs successfully without warnings or errors
 - [ ] `coverage.sh` runs successfully without warnings or errors
 - [ ] there are zero skipped tests
+- [ ] `KNOWN-ISSUES.md` is up to date
+- [ ] if a PR exists, the PR title, description and content are up to date
 
 # C# Code Style