chore(rails): Upgrade to Rails 8.1.4

lib/migration_waiter.rb

@@ -15,7 +15,7 @@ class MigrationWaiter
     def wait
       attempts_remaining = ATTEMPTS
       loop do
-        pending_migrations = ActiveRecord::Base.connection.migration_context.open.pending_migrations.size
+        pending_migrations = ActiveRecord::Base.connection_pool.migration_context.open.pending_migrations.size
         if pending_migrations.zero?
           Postal.logger.info "no pending migrations, continuing"
           return

lib/tasks/annotate_rb.rake

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+# This rake task was added by annotate_rb gem.
+
+# Can set `ANNOTATERB_SKIP_ON_DB_TASKS` to be anything to skip this
+if Rails.env.development? && ENV["ANNOTATERB_SKIP_ON_DB_TASKS"].nil?
+  require "annotate_rb"
+
+  # Can modify the config path here if needed - by default, it's .annotaterb.yml in the root of the project
+  # AnnotateRb::ConfigFinder.config_path = ""
+  AnnotateRb::Core.load_rake_tasks
+end