feat: Improve handling of association name config

lib/membership/membership.ex

@@ -178,6 +178,18 @@ defmodule Mv.Membership do
     end
   end
 
+  @doc """
+  Invalidates the global settings cache.
+
+  This should be used by callers that update settings through paths outside of
+  `update_settings/2` (for example, custom form submit flows) to keep reads via
+  `get_settings/0` consistent across views.
+  """
+  @spec invalidate_settings_cache() :: :ok
+  def invalidate_settings_cache do
+    SettingsCache.invalidate()
+  end
+
   @doc """
   Lists only required custom fields.