Case C-299/19: Judgment of the Court (Ninth Chamber) of 18 November 2020 (request for a preliminary ruling from the Tribunale ordinario di Torino — Italy) — Techbau SpA v Azienda Sanitaria Locale AL (Reference for a preliminary ruling — Combating late payments in commercial transactions — Directive 2000/35/EC — Concept of ‘commercial transactions’ — Concepts of ‘delivery of goods’ and ‘provision of services’ — Article 1 and first subparagraph of Article 2(1) — Public works contract)