WhatsApp API v7

GET /api/qr/:sessionId — QR code login

GET /api/status/:sessionId — Cek status

POST /api/send — Kirim pesan (auto session)
Body: { "number": "628xxx", "message": "Hello" }

POST /api/send/:sessionId — Kirim pesan (session tertentu)
Body: { "number": "628xxx", "message": "Hello" }

GET /api/health — Health check

POST /api/check-number — Cek nomor terdaftar WA
Body: { "number": "628xxx" }

POST /api/pair/:sessionId — Pair via nomor
Body: { "phoneNumber": "628xxx" }

POST /api/logout/:sessionId — Logout & hapus session

GET /api/sessions — List semua session

POST /api/sessions — Buat session baru
Body: { "sessionId": "...", "name": "..." }

DELETE /api/sessions/:sessionId — Hapus session

GET /api/sessions/:sessionId/info — Info session