`offer_issuer_id` included in offers with (blinded) `offer_paths`

1. Only have private channels (required because of https://github.com/ElementsProject/lightning/issues/7713) and no public channels.
2. Create new offer
3. decode the offer
4. Find that `offer_issuer_id` included in offers with (blinded) `offer_paths`, revealing your node ID and defeating the purpose of the blinded paths.

https://github.com/lightning/bolts/blob/247e83d528a2a380e533e89f31918d7b0ce6a0c1/12-offer-encoding.md?plain=1#L341 says that "The `offer_issuer_id` can be omitted for brevity, if `offer_paths` is set, as each of the final `blinded_node_id` in the paths can serve as a valid public key for the destination.". It seems to me though that in the spec if `offer_paths` is set,`offer_issuer_id` **should** be omitted for **privacy**.