Funnel Queries: Increase Buffer Size

[winsmith]

When compiling a funnel query, increase the accuracy parameter if the data source is not telemetry-signals. This increases accuracy for riedel.wtf

[Julian-TMD]

I think this was the page and naming is "size"
https://druid.apache.org/docs/latest/development/extensions-core/datasketches-theta/

[winsmith]

Issue still occurs:

https://dashboard.telemetrydeck.com/apps/464F4DA3-4725-4D46-AFCB-965B2BCF01BD/notebooks/4DD3CB56-8AAD-4488-8222-417DA6EE988B