fix(websocket): Prevent crash on network disconnect during send

When WiFi disconnects, `esp_websocket_client_task` continues polling
`esp_transport_poll_read()` with a default 1-second timeout.
If a timeout triggers `esp_websocket_client_abort_connection`,
certain resources are released.
However, if `esp_websocket_client_send_with_exact_opcode`
is still blocked at this point, it will cause a crash
when it times out and accesses the released handle.
This fix prevents potential crashes by ensuring proper
synchronization between abort and send functions.

Merges: #629

components/esp_websocket_client/esp_websocket_client.c

@@ -1083,7 +1083,9 @@ static void esp_websocket_client_task(void *pv)
                 } else {
                     esp_websocket_client_error(client, "esp_transport_poll_read() returned %d, errno=%d", read_select, errno);
                 }
+                xSemaphoreTakeRecursive(client->lock, lock_timeout);
                 esp_websocket_client_abort_connection(client, WEBSOCKET_ERROR_TYPE_TCP_TRANSPORT);
+                xSemaphoreGiveRecursive(client->lock);
             }
         } else if (WEBSOCKET_STATE_WAIT_TIMEOUT == client->state) {
             // waiting for reconnecting...