Warning: The following story contains descriptions of sensitive topics such as mental health and suicide, and may be triggering for some readers. If you are struggling, please contact a mental health professional or crisis line for support. With the winter snow melting around Louisville in recent weeks, 36-year-old Kristen Keeling decided it was the perfect Sunday to run her favorite route over the George Rogers Clark Memorial Bridge. The Old Louisville resident, wife and mother of four had agreed to a “frozen feet” challenge with her sister, where they both walked or ran at least a mile daily in…..