Fix warnings on Rails boot (#16946)

lib/sidekiq_error_handler.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class SidekiqErrorHandler
+  BACKTRACE_LIMIT = 3
+
+  def call(*)
+    yield
+  rescue Mastodon::HostValidationError
+    # Do not retry
+  rescue => e
+    limit_backtrace_and_raise(e)
+  ensure
+    socket = Thread.current[:statsd_socket]
+    socket&.close
+    Thread.current[:statsd_socket] = nil
+  end
+
+  private
+
+  def limit_backtrace_and_raise(exception)
+    exception.set_backtrace(exception.backtrace.first(BACKTRACE_LIMIT))
+    raise exception
+  end
+end