Add user account deletion delay setting

config/initializers/config.rb

@@ -79,6 +79,7 @@ Config.setup do |config|
     required(:max_number_of_relation_members).filled(:int?)
     required(:max_issues_count).filled(:int?)
     required(:api_timeout).filled(:int?)
+    required(:user_account_deletion_delay).maybe(:number?)
     required(:imagery_blacklist).maybe(:array?)
     required(:status).filled(:str?, :included_in? => ALLOWED_STATUS)
     required(:avatar_storage).filled(:str?)

config/settings.yml

@@ -53,6 +53,8 @@ api_timeout: 300
 web_timeout: 30
 # Periods (in hours) which are allowed for user blocks
 user_block_periods: [0, 1, 3, 6, 12, 24, 48, 96, 168, 336, 731, 4383, 8766, 87660]
+# Account deletion cooldown period (in hours) since last changeset close; null to disable, 0 to make sure there aren't any open changesets when the deletion happens
+user_account_deletion_delay: null
 # Rate limit for message sending
 max_messages_per_hour: 60
 # Rate limit for friending