Prefer the term metric over stat #1332
Merged
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Currently, the code uses the term "stat" ambiguously. Sometimes it refers to a specific number statistic (e.g., 57,341,606,128 instruction counts recorded), and sometimes it refers to a class of statistic (e.g., "instruction counts"). The glossary disambiguates these two using the term "stat(istic)" for the former and "metric" for the later. This PR brings the code into alignment with the glossary.
Note: the API still uses "stat" for what is now called "metric". Since change the API is a little more error prone, I suggest we save that for a follow-up.