feat: 🦠 Metrics prototype for Rack instrumentation #3558

Job	Run time
action_mailer / ubuntu-latest	33s
action_pack / ubuntu-latest	23s
action_view / ubuntu-latest	25s
active_job / ubuntu-latest	32s
active_model_serializers / ubuntu-latest	20s
active_record / ubuntu-latest	28s
active_support / ubuntu-latest	22s
all / ubuntu-latest	23s
aws_sdk / ubuntu-latest	34s
aws_lambda / ubuntu-latest	23s
base / ubuntu-latest	22s
concurrent_ruby / ubuntu-latest	22s
delayed_job / ubuntu-latest	31s
ethon / ubuntu-latest	22s
excon / ubuntu-latest	30s
faraday / ubuntu-latest	25s
grape / ubuntu-latest	32s
graphql / ubuntu-latest	30s
gruf / ubuntu-latest	27s
http / ubuntu-latest	28s
http_client / ubuntu-latest	22s
httpx / ubuntu-latest	27s
koala / ubuntu-latest	22s
lmdb / ubuntu-latest	28s
net_http / ubuntu-latest	22s
rack / ubuntu-latest	28s
rails / ubuntu-latest	31s
restclient / ubuntu-latest	23s
rspec / ubuntu-latest	20s
sinatra / ubuntu-latest	29s
	13m 4s

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