add whiteboard_eraser and note_deleting tracking, add roles

database/migrations/.snapshot-collab_space.json

database/migrations/Migration20250331123411.ts

database/migrations/Migration20250331132156.ts

...gration20250331133722_modify_session_points_constraint.ts

src/activities/activities.service.ts

src/auth/auth.guard.ts

src/channel/notes.gateway.ts

src/channel/whiteboard.gateway.ts

src/points/sessionPoints.entity.ts

src/points/sessionPoints.service.ts

src/room/roomSession.controller.ts

src/room/roomSession.dto.ts

src/room/roomSession.service.ts

src/room/roomSessionUser.dto.ts

src/room/roomSessionUser.service.ts