Case C-95/20: Judgment of the Court (Ninth Chamber) of 28 October 2021 (request for a preliminary ruling from the Administrativen sad Varna — Bulgaria) — ‘Varchev Finans’ EOOD v Komisia za finansov nadzor (Reference for a preliminary ruling — Directive 2014/65/EU — Markets in financial instruments — Delegated Regulation (EU) 2017/565 — Investment firms — Article 56 — Assessment of appropriateness and related record-keeping obligations — Article 72 — Retention of records — Methods of retention — Information concerning client categorisation — Information on costs and associated charges relating to investment services)