start limiters in mix tasks

lib/mix/pleroma.ex

@@ -19,6 +19,7 @@ defmodule Mix.Pleroma do
   def start_pleroma do
     Pleroma.Config.Holder.save_default()
     Pleroma.Config.Oban.warn()
+    Pleroma.Application.limiters_setup()
     Application.put_env(:phoenix, :serve_endpoints, false, persistent: true)
 
     if Pleroma.Config.get(:env) != :test do

lib/pleroma/application.ex

@@ -274,6 +274,7 @@ defmodule Pleroma.Application do
 
   defp http_children(_, _), do: []
 
+  @spec limiters_setup() :: :ok
   def limiters_setup do
     [Pleroma.Web.RichMedia.Helpers, Pleroma.Web.MediaProxy]
     |> Enum.each(&ConcurrentLimiter.new(&1, 1, 0))