public static final String ERROR_MODEL_NOT_FOUND = "model_not_found";

    /** Error code for invalid response from the LLM provider. */
    public static final String ERROR_INVALID_RESPONSE = "invalid_response";

    /** Error code for connection errors. */
    public static final String ERROR_CONNECTION = "connection_error";

    /** Error code for unknown errors. */

     * Validates that the heartbeat response is correct.
     * The response sequence number should match the request sequence number.
     *
     * @return true if the response is valid
     */
    public boolean isValidResponse() {
        return isSuccess() && responseSequenceNumber == sequenceNumber;
    }

    @Override
    protected void encodeWitnessParameters(NdrBuffer buf) throws NdrException {