Update whatsapp_client.py

whatsapp_client.py

@@ -87,11 +87,12 @@ def _send_via_proxy(recipient_id: str, message_data: Dict[str, Any]) -> bool:
     """POST to Cloudflare Worker /send — worker relays to graph.facebook.com."""
     url = f"{_PROXY_URL}/send"
     try:
-        resp = requests.post(
+        # Use _session (not requests.post) so the socket-level DNS patch
+        # applies — HF cannot resolve .workers.dev via system DNS.
+        resp = _session.post(
             url,
             json={"recipient_id": recipient_id, "message_data": message_data},
             timeout=30,
-            verify=certifi.where(),
             headers={"Content-Type": "application/json"},
         )
         resp.raise_for_status()