Integrate WhatsApp Calling Choose the next step - Setup, webhook handling, or call actions: read Calling API contract. - Connecting a voice runtime or debugging audio: read Provider integration. - Recording/transcription opt-in, completion notifications, saved artifacts, or pricing: read Native artifacts and pricing. - Public guides: Calling setup, receive calls, and outbound calls. Work with the user's chosen project, number, provider, and hosting environment. Use credentials from environment variables or the configured secret store; keep keys, webhook secrets, and signed provider URLs out o…