[socket] Log error when UDP socket requested on LWIP TCP-only platforms

The LWIP raw socket factory only supports TCP but silently ignored the
type parameter, returning a TCP socket for SOCK_DGRAM requests. This
caused components expecting UDP to fail silently with no indication of
why. Return nullptr with EPROTOTYPE and log an error instead.

esphome/components/socket/lwip_raw_tcp_impl.cpp

@@ -680,6 +680,11 @@ class LWIPRawListenImpl final : public LWIPRawImpl {
 };
 
 std::unique_ptr<Socket> socket(int domain, int type, int protocol) {
+  if (type != SOCK_STREAM) {
+    ESP_LOGE(TAG, "UDP sockets not supported on this platform, use WiFiUDP");
+    errno = EPROTOTYPE;
+    return nullptr;
+  }
   auto *pcb = tcp_new();
   if (pcb == nullptr)
     return nullptr;