Set case log ID offset at export (#562)

app/services/exports/case_log_export_service.rb

@@ -18,6 +18,8 @@ module Exports
       field_name.starts_with?("details_known_") || pattern_age.match(field_name) || omitted_attrs.include?(field_name) ? true : false
     end
 
+    LOG_ID_OFFSET = 300_000_000_000
+
   private
 
     def save_export_run
@@ -71,6 +73,7 @@ module Exports
             next
           else
             value = case_log.read_attribute_before_type_cast(key)
+            value += LOG_ID_OFFSET if key == "id"
             form << doc.create_element(key, value)
           end
         end

spec/services/exports/case_log_export_service_spec.rb

@@ -13,7 +13,7 @@ RSpec.describe Exports::CaseLogExportService do
   let(:case_log) { FactoryBot.create(:case_log, :completed) }
 
   def replace_entity_ids(export_template)
-    export_template.sub!(/\{id\}/, case_log["id"].to_s)
+    export_template.sub!(/\{id\}/, (case_log["id"] + Exports::CaseLogExportService::LOG_ID_OFFSET).to_s)
     export_template.sub!(/\{owning_org_id\}/, case_log["owning_organisation_id"].to_s)
     export_template.sub!(/\{managing_org_id\}/, case_log["managing_organisation_id"].to_s)
     export_template.sub!(/\{created_by_id\}/, case_log["created_by_id"].to_s)