s3-estate-calibration-auditor

Audit an estate of AWS S3 buckets for the one bucket that is genuinely publicly or cross-account exposed, without over-flagging the many buckets that READ as exposed but are neutralised. Resolves each bucket's EFFECTIVE verdict by composing four layers (Block Public Access x bucket policy x bucket ACL x access points), never one layer alone, then rolls the per-bucket verdicts up into an estate verdict. Its…