server: add metrics for CORS handlers.#1429
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ericchiang
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server: add metrics for CORS handlers.
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I am troubleshooting an issue with my Dex setup where tokens fail to get refreshed (due to getting a 401 back on
/token), and I realized that there are no metrics for the/tokenendpoint, which is a bit annoying as it makes it harder to track how frequently this issue is happening over time, is it the first time it happens, etc. So I figured it be nice to add the same basic instrumentation that other handlers benefit from to the CORS handlers as well.