Not sure if you're still looking, or what your budget is, but back in 2018(ish?) I worked at a semiconductor company that was looking to write their own system

Not sure if you're still looking, or what your budget is, but back in 2018(ish?) I worked at a semiconductor company that was looking to write their own system for analyzing production test data. We tested a bunch of databases and decided to use Clickhouse. We paid for a support contract from a company called "Altinity". They consulted on the the schema, how we were loading the data, the queries and even fixed some bugs in Clickhouse that we hit. Looking at their site now, it looks like they've grown a lot and aren't a just boutique Clickhouse consultancy, but offer managed clickhouse cloud instances. There's still a reference to their support contract on the site though, so might still be worth a chat with them. I have no affiliation with them, just an extremely pleased ex-customer. That was a long time ago though, so I take no responsibility if they've gone to shit now :D.