The cardinality of this new metric is:
buckets - 16
path + method - around 100 (the number of Actions we have)
authLevel - at most 3
success - 2
Total: 16*100*3*2 = 9,600
This is still low, especially for the value it could give in understanding our system (graphs of all endpoints, how often are they called, how long they take, how often do they fail)
Instead of "success true/false", we might want to give the actual status code. This can be a bit annoying because HttpServletResponse doesn't have a getStatus.
But it's possible, and worth considering.
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