- Add TestSprintIssues class (5 tests) - List sprint issues (empty/with data) - Add issue to sprint - Add nonexistent issue to sprint - Add TestSprintCrossProjectValidation class (3 tests) - IDOR prevention for get/update/start through wrong project Coverage: sprints.py 72% → 76% 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>