CalculateScore now accepts a forWhitelist flag to handle whitelist
scoring logic separately. The final blacklist grade combines both
RBL and DNSWL results using MinGrade for a more accurate reputation
assessment.
Move the ListedCount check before scoringListCount calculation so we
return early with a perfect score when the IP/domain is not listed,
regardless of how many informational-only lists exist.
Add DefaultInformationalRBLs (UCEPROTECT L2/L3) and track listings
separately via RelevantListedCount so these broader lists are displayed
but excluded from the deliverability score calculation.
