feat: Use env vars to override generated activity / facilityType#197

lukehesluke merged 1 commit intofeature/ref-impl-dbopenactive/OpenActive.Server.NET:feature/ref-impl-dbfrom

feature/ref-impl-db-overrideable-activityopenactive/OpenActive.Server.NET:feature/ref-impl-db-overrideable-activityCopy head branch name to clipboard