Server/new-api

Автор	SHA1 Съобщение	Дата
Seefs	f424f906d8 feat: sync upstream pricing from pricing endpoint (#4452)	преди 2 седмици
CaIon	f2f3410dcf feat: add `len` variable for tier conditions and LLM prompt helper	преди 2 седмици
CaIon	c5405b2a12 feat: add billing expression system documentation and enhance tiered billing logic	преди 1 месец
CaIon	91ed4e196a feat: implement tiered billing expression evaluation and related functionality	преди 1 месец