Another "retrospective" ADR, like the cucumber one.
This explains our JSONLogic choice, shared `$evaluators`, as well as the
the semantics of flagd's use of OpenFeature's [resolution
reasons](https://openfeature.dev/specification/types#resolution-reason).
---------
Signed-off-by: Todd Baert <todd.baert@dynatrace.com>
Todd Baert