Support end to end distributed tracing with Alloy

[sarita-maersk]

Request

Enable distributed tracing where the request flow starts from Alloy and continues to downstream services. I’ve already enabled Alloy’s meta-monitoring with the tracing block and can see Alloy's traces, but I’m unsure if it’s possible to enable distributed tracing and set Traceparent header or something similar which will get propagated to downstream services. Could anyone guide me on this?

tracing {
 sampling_fraction = 0.1
 write_to         = [otelcol.processor.attributes.default.input]
}

Use case

Support Traceparent header in Alloy self tracing.