The photo was probably clicked to attach it to some sort of internal candidate feedback form. Photos ensure that the interviewer does not make a typographical mistake while entering it in.
Also production quality code is usually interview speak for "Your code should be more robust i.e. check inputs and return values from library functions. Fix it."
Also production quality code is usually interview speak for "Your code should be more robust i.e. check inputs and return values from library functions. Fix it."