Micro-optimization: use `if`/`else` instead of `Array#compact` and `Array#min` (#19906)

* Technically `if`/`else` is faster than using `[value1, value2].compact.min` to find the lesser of two values, one of which may be `nil`.

app/models/account_statuses_cleanup_policy.rb

@@ -139,7 +139,12 @@ class AccountStatusesCleanupPolicy < ApplicationRecord
     # Filtering on `id` rather than `min_status_age` ago will treat
     # non-snowflake statuses as older than they really are, but Mastodon
     # has switched to snowflake IDs significantly over 2 years ago anyway.
-    max_id = [max_id, Mastodon::Snowflake.id_at(min_status_age.seconds.ago, with_random: false)].compact.min
+    snowflake_id = Mastodon::Snowflake.id_at(min_status_age.seconds.ago, with_random: false)
+
+    if max_id.nil? || snowflake_id < max_id
+      max_id = snowflake_id
+    end
+
     Status.where(Status.arel_table[:id].lteq(max_id))
   end