The metrics middleware gave the handler label each request's path, so
every new path added series that were never removed, and /metrics
listed encrypted URL tokens. The label is now the pattern of the chi
route the request matches, or "unmatched" for one that matches none.
The metrics library takes the label before calling the handler, so the
middleware asks the router with chi's Find which route matches.
Model: opus-5-5
sneak
6ca43e26d7