Hey folks. I'm currently PoCing SigNoz (we'd like to migrate from a different vendor). The initial integration went smoothly. I do have a question about the log queries though. I can spot that our json logs we automatically interpreted as such - e.g. I can use a filter like body.{someAttribute}={whatever}. However, the "group by" doesn't seem to accept any "body" attribute. e.g. we often run basic statistics on how many API calls were performed "by customerId" (thus e.g. group by body.customerId). Strangely filtering by "body.customerId EXISTS" works nicely, but grouping doesn't. Is this a bug or some kind of limitation or am I doing something wrong? Thx