[#66254180]save history entry for in_professional_training
Merge 66254180-history-in-prof-training to master

[Completes #66254180]
[#65862418] verbose rake task
install appsignal
add some appsignal instruments
disable appsignal on staging
[#66173028] add instrument to Contact#as_json
[#66173028] finer grain of instrumentation
[#47489103] store when age was estimaged
remove oj gem
[#47489103] calculate age
[#47489103] avoid age < 0
[#47489103] DRY specs
[#47489103] rename method to age_for
[#47489103] memoize ages
[#47489103] remove placeholder code
[#47489103] rename AverageAge to Age
[#47489103]refactor scope refinning to a concern module
[#47489103] comments
[#47489103] add api to get average_age