Changes to GET /userreports

the response property userreports/items/month_details/items/week_details/items/day_details/items/diff became nullable for the status 200

the response property userreports/items/month_details/items/week_details/items/diff became nullable for the status 200

the response property userreports/items/month_details/items/sum_reduction_used became nullable for the status 200

the response property userreports/items/month_details/items/week_details/items/sum_reduction_used became nullable for the status 200

for the query request parameter year, the max was increased from 2026.00 to 2027.00