CLDC-4298: Ensure value must be a whole number (#3297)

* CLDC-4298: Update purchase price step for 2026

* CLDC-4298: Add a rake task to round value values

* fixup! CLDC-4298: Add a rake task to round value values

remove redundant query

update desc

remove unneeded comment

app/models/form/sales/questions/purchase_price.rb

@@ -4,7 +4,7 @@ class Form::Sales::Questions::PurchasePrice < ::Form::Question
     @id = "value"
     @type = "numeric"
     @min = form.start_year_2026_or_later? ? 15_000 : 0
-    @step = 0.01
+    @step = form.start_year_2026_or_later? ? 1 : 0.01 # 0.01 was a mistake that was fixed in 2026
     @width = 5
     @prefix = "£"
     @ownership_sch = ownershipsch

lib/tasks/round_value_for_2026_sales_logs.rake

@@ -0,0 +1,11 @@
+desc "Rounds purchase price (the 'value' field) for sales logs in the database if not a whole number"
+task round_value_for_2026_sales_logs: :environment do
+  logs = SalesLog.filter_by_year(2026).where("value % 1 != 0")
+  puts "Correcting #{logs.count} sales logs, #{logs.map(&:id)}"
+
+  logs.find_each do |log|
+    log.update(value: log.value.round)
+  end
+
+  puts "Done"
+end