fix: existing ZIP related code need to change for the new version gem

Author: leonardow-unep-wcmc

app/workers/manual_download_worker.rb

@@ -97,7 +97,9 @@ def zip_file_generator
 
       FileUtils.cp file_path, @download_path
 
-      Zip::File.open(zip_file_name, Zip::File::CREATE) do |zip|
+      # rubyzip 3 removed Zip::File::CREATE, so we pass `create: true`
+      # explicitly to keep manual downloads working on the current gem version.
+      Zip::File.open(zip_file_name, create: true) do |zip|
         zip.add("Identification-materials-#{@display_name}.pdf", @download_path)
 
         if missing_files.present?

lib/tasks/export_trade_db.rake

@@ -80,7 +80,7 @@ namespace :export do
       end
       Rails.logger.info('Trade database completely exported!')
       zipfile = 'tmp/trade_db_files/trade_db.zip'
-      Zip::File.open(zipfile, Zip::File::CREATE) do |zipfile|
+      Zip::File.open(zipfile, create: true) do |zipfile|
         zipfile.add(filename, path_to_file)
       end
       delete_csv_files(dir)
@@ -137,7 +137,7 @@ namespace :export do
       end
       Rails.logger.info('Trade database completely exported!')
       zipfile = 'tmp/trade_db_files/trade_db.zip'
-      Zip::File.open(zipfile, Zip::File::CREATE) do |zipfile|
+      Zip::File.open(zipfile, create: true) do |zipfile|
         range.each do |year|
           if (2012..2015).include?(year)
             filename = "trade_db_#{year}_Animalia.csv"
@@ -183,7 +183,7 @@ namespace :export do
       end
       Rails.logger.info('Trade database completely exported!')
       zipfile = 'tmp/trade_db_files/trade_db.zip'
-      Zip::File.open(zipfile, Zip::File::CREATE) do |zipfile|
+      Zip::File.open(zipfile, create: true) do |zipfile|
         (1..i).each do |index|
           filename = "trade_db_#{index}.csv"
           path_to_file = dir + filename