API: Make it easier to determine a batch and an on-chain txid given an order

[kornpow]

Is your feature request related to a problem? Please describe.
I would like to easily correlate a given order, to a given batch and txid of that batch. Currently I need to iterate over a lot of data in order to finally obtain all of this information.

Describe the solution you'd like

Ideally: when calling list_sidecars or list_orders if the order/sidecar has been matched, it should show the txid and batch id in this API

Describe alternatives you've considered
Currently I am achieving this like so:

# First start with a sidecar id. I got this one by listing the sidecars and finding one that was in the completed state
sidecar_id = b"\3405\254(B\300\225\231"
sidecar_nonce = pool.list_sidecars(sidecar_id).tickets[0].order_bid_nonce

# Obtain the order, associated with the sidecar
# it would be understandable if I could stop here, and get the information I want from the order object
# but I must continue...
for i in pool.list_orders(active_only=False).bids:
	if i.details.order_nonce == sidecar_nonce:
		order = i

# get the lease txid by matching nonces
target_lease = None
for i in pool.leases(batch_ids=[],accounts=[]).leases:
	if i.order_nonce == sidecar_nonce:
		target_lease = i
		break
lease_txid = target_lease.channel_point.txid[::-1].hex()

# finally get the batch_id by matching batch_txid with the above txid
bs = pool.batch_snapshots(b"", 50)

lease_batch = None
for b in bs.batches:
	if b.batch_tx_id == lease_txid:
		lease_batch = b.batch_id
		break

This is kind of tedious, and also if the database of leases/orders/sidecars is really large, could be very inefficient.