logging level order is not aligned order

This was done as a nod to previous versions of CI where you could say, "log this error or other errors more critical" by specifying a threshold value.

We should probably remove the link to the RFC, honestly, since it's simply an implementation of PSR3, which doesn't specify any requirement for the numerical value used, nor does it specify that you should use the RFC's values. It simply references the levels. The only reason that was put in our docs was to provide a resource with more information about when the different levels should be considered useful.

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