WhatsApp always closes the pairing socket with DisconnectReason.restartRequired
(515) right after a successful QR scan, so the login flow treated every
successful scan as "connection closed". Recreate the socket with the saved
credentials and keep waiting for the open event instead, matching the openclaw
reference behavior. Also restart on QR rotation timeout (408) to serve a fresh
QR, bounded by a restart limit.
Tested:
- cd adapters && bun test (397 pass)
- cd adapters && bunx tsc --noEmit -p tsconfig.json
- bun test src/server/__tests__/adapters.test.ts
