- Add delete_sessions_by_character() method to SessionService that cleans up all game sessions associated with a character - Update delete_character() to hard delete instead of soft delete - Call session cleanup before deleting character to prevent orphaned data - Delete associated chat messages when cleaning up sessions - Update API documentation to reflect new behavior 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>