Fix Credo Readability (strict)

- Max line length, implicit try, alias order, zero-arity defs
- String sigils, long comments split; redundant blank lines fixed

lib/mv/oidc_role_sync.ex

@@ -82,11 +82,9 @@ defmodule Mv.OidcRoleSync do
   end
 
   defp safe_get_atom(map, key) when is_binary(key) do
-    try do
-      Map.get(map, String.to_existing_atom(key))
-    rescue
-      ArgumentError -> nil
-    end
+    Map.get(map, String.to_existing_atom(key))
+  rescue
+    ArgumentError -> nil
   end
 
   defp safe_get_atom(_map, _key), do: nil