refactor render_missing_params out
Add errors module
include errors module in application controller
increase max method length
re-implement destroy to require reason, close associated assignment
add tests for new destroy method
disable RaiseArgs cop (too strict)
collapse extra line
add routes for helper assignments
more specific rescue
add reassign endpoint
implement helper_assignments endpoints
implement helper_assignments views
test helper_assignments#index
test and debug helper_assignments#show
add create route to helper_assignments
add validation_error to application controller
use render_validation_error in some actions
add missing parameter handling, fix show status in helper_assignments
Fix validation error message in old tests