Server/new-api

Автор	SHA1 Съобщение	Дата
CaIon	5ec4633cb8 refactor(task): add CAS-guarded updates to prevent concurrent billing conflicts	преди 2 седмици
CaIon	d6e11fd2e1 feat(task): add adaptor billing interface and async settlement framework	преди 3 седмици
CaIon	9e3954428d refactor(task): extract billing and polling logic from controller to service layer	преди 3 седмици