Possibility of data corruption in RequestResponse logic

[DeeFuse]

I think there is a possible data corruption possibility in the response sending code here:

thingset-zephyr-sdk/src/can.c

Lines 537 to 541 in 425cfce

	int err = thingset_can_send_inst(ts_can, sbuf->data, tx_len, target_addr, route,
	NULL, NULL, K_NO_WAIT);
	if (err != 0) {
	k_sem_give(&sbuf->lock);
	}

The semaphore will be released bevore the transmission is completed, which may take some time in case of a large reply.
I think the semaphore shall be released in a sent callback handler instead of right after the transmission has been initialized.

might be related to #57