refact

lib/domain/service/last_callers_service.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class LastCallersService
+  def initialize(repo) = @repo = repo
+
+  def record(username, session_id) = @repo.record(username, session_id)
+  def recent(n = 10)               = @repo.recent(n)
+end