start chat deps through supervisor

lib/pleroma/application/chat_supervisor.ex

@@ -0,0 +1,19 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Application.ChatSupervisor do
+  use Supervisor
+
+  def start_link(_) do
+    Supervisor.start_link(__MODULE__, :no_args)
+  end
+
+  def init(_) do
+    [
+      Pleroma.Web.ChatChannel.ChatChannelState,
+      {Phoenix.PubSub, [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2]}
+    ]
+    |> Supervisor.init(strategy: :one_for_one)
+  end
+end

lib/pleroma/application/config_dependent_deps.ex

@@ -8,7 +8,7 @@ defmodule Pleroma.Application.ConfigDependentDeps do
   require Logger
 
   @config_path_mods_relation [
-    {{:pleroma, :chat}, Pleroma.Web.ChatChannel.ChatChannelState},
+    {{:pleroma, :chat}, Pleroma.Application.ChatSupervisor},
     {{:pleroma, Oban}, Oban},
     {{:pleroma, :rate_limit}, Pleroma.Web.Plugs.RateLimiter.Supervisor},
     {{:pleroma, :streamer}, Pleroma.Web.Streamer.registry()},

lib/pleroma/application/start_up_dependencies.ex

@@ -178,10 +178,7 @@ defmodule Pleroma.Application.StartUpDependencies do
 
   defp maybe_add_chat_child(children) do
     if Config.get([:chat, :enabled]) do
-      [
+      [Pleroma.Application.ChatSupervisor | children]
-        Pleroma.Web.ChatChannel.ChatChannelState,
-        {Phoenix.PubSub, [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2]} | children
-      ]
     else
       children
     end