Describe LAVA Business configuration: env keys, webhook URL and signature scheme, RUB-only invoices, and the include-services filter. Mention LAVA in the provider lists of the README, admin panel page, and tariff currency matrix.
Describe LAVA Business configuration: env keys, webhook URL and signature scheme, RUB-only invoices, and the include-services filter. Mention LAVA in the provider lists of the README, admin panel page, and tariff currency matrix.