add event to mock helper
implement event slot schema
implement event model
add Event.create test
implement Event.create
add Event collecion mock helper
add Event.read tests
implement Event.read
fix Event.read
fix Event collection mock helper
add Event.get_by_id tests
implement Event.get_by_id
add Event.update tests
implement Event.update
fix typo in event model
add Event.delete tests
implement Event.delete
fix double Event.update response
use when instead of if
expand breaks duration field deeper