add notified_at data
add useful method to filter runners
add a way to retrive first waiting payment
apply race number only once
add a way to apply notification
add useful method to test payment status
add unit test for isNotified
improve valid notification with payment status
send validation email on payment choice
hide runners without raceNumber
check if one payment waiting exists before create
send cheque notification only for teams
filter runners without race number
send valid notification on creation
add action to re-notify a user
add notification info
add confirm before deletion
add a re-notify button