Unify all operations within same connection into span
Related issue: #271 (closed)
Currently, when someone performs git pull, we have the following traces:
Since it's a single operation, it'd be cool to unify these calls under a single span:
And have it broken down as:
It means that within a single git pull, a GET request (to /authorized_keys endpoint), a POST request (to /allowed endpoint), and a Gitaly RPC with the same correlation-id have been performed.


