oe-docs-updates

Keeps OpenEvent-AI “living docs” in sync while coding. Use whenever you fix a bug, discover a new bug, add/modify behavior, or capture a future idea. Updates docs/guides/TEAM_GUIDE.md (bug list + regressions), DEV_CHANGELOG.md (what changed), new_features.md (ideas parked for later), and TO_DO_NEXT_SESS.md (next-session tasks).