Elixir 1.19: Fix typing violation on struct updates in Pleroma.Marker

warning: a struct for Pleroma.Marker is expected on struct update:

        %Pleroma.Marker{marker | user: user}

    but got type:

        dynamic()

    where "marker" was given the type:

        # type: dynamic()
        # from: lib/pleroma/marker.ex
        {:ok, marker}

    when defining the variable "marker", you must also pattern match on "%Pleroma.Marker{}".

    hint: given pattern matching is enough to catch typing errors, you may optionally convert the struct update into a map update. For example, instead of:

        user = some_function()
        %User{user | name: "John Doe"}

    it is enough to write:

        %User{} = user = some_function()
        %{user | name: "John Doe"}

    typing violation found at:
    │
 81 │       {:ok, marker} -> %__MODULE__{marker | user: user}
    │                        ~
    │
    └─ lib/pleroma/marker.ex:81:24: Pleroma.Marker.get_marker/2

lib/pleroma/marker.ex

@@ -78,7 +78,7 @@ defmodule Pleroma.Marker do
 
   defp get_marker(user, timeline) do
     case Repo.find_resource(get_query(user, timeline)) do
-      {:ok, marker} -> %__MODULE__{marker | user: user}
+      {:ok, %__MODULE__{} = marker} -> %__MODULE__{marker | user: user}
       _ -> %__MODULE__{timeline: timeline, user_id: user.id}
     end
   end