OpenTelemetry: Allow filtering field resolver telemetry based on duration

[cmeeren]

Product

Hot Chocolate

Is your feature request related to a problem?

If I understand correctly, when configured with OpenTelemetry, HotChocolate currently creates a ResolveFieldValue activity/span for all async field resolvers, but not for sync field resolvers, presumably to reduce noise and data ingestion costs for the common case of sync resolvers.

I have many fields that are async (ValueTask) only because they perform some async locking. These generally complete synchronously in under 1ms. I would like to exclude these from being exported, just as if they were sync fields.

The solution you'd like

I have tried for several hours now to find a way of not exporting these, using processors and whatnot, but I haven't gotten anywhere. It would be great if HotChocolate provided some way of filtering trace telemetry from the source.