[DISCUSS] PIP-373: Add a topic's system prop that indicates whether users have published TXN messages in before

[Yubiao Feng]

Hi all

I drafted a proposal to add a topic's system prop that indicates whether
users have published TXN messages in before.

https://github.com/apache/pulsar/pull/23210

I'm looking forward to hearing from you.

Thanks
Yubiao Feng