Alex Cardell

The middleware would be useful for the example, but I don't believe it's necessary otherwise

Upgraded to otel4s 0.7 but thanks to sbt 1.10 that required a few other updates Also added http4s-otel4s-middleware to the example

@Baccata I've got us set up with a cats-mtl (implicit `Ask[F, User]`) tagless final example which took some type tetris and would be happy to share it as an example...

:+1: for this, we've been having to write little wrapper middlewares to do the parent span options