Trace topology view

[codefromthecrypt]

would be nice to be able to aggregate service dependency links and show them

This might use code similar to https://github.com/jaegertracing/jaeger/blob/eaacbf0a40da0c3d55bfeed8d6894f14dca1d4fc/plugin/storage/memory/memory.go#L96

I once wrote one in zipkin, which has more edge cases covered maybe due to duplicate client spans and endpoint change heuristics https://github.com/openzipkin/zipkin/blob/master/zipkin/src/main/java/zipkin2/internal/DependencyLinker.java

Whatever way, I guess the first version doesn't need to be too fancy