Make the export bucket pay for itself

Analytics stores multi-megabyte Parquet exports and tiny JSON manifests under exports/ in acme-reports. Storage cost keeps growing and a draft lifecycle policy failed review. Dashboards need direct access to the latest 30 days, compliance requires seven years of retrieval, and other prefixes must be untouched.

Repair lifecycle.json with a valid, cost-effective archive schedule for exports/ only.

• Keep the first 30 days in S3 Standard, archive eligible exports before moving them to Deep Archive, and respect each storage class's minimum duration.
• Handle sub-128 KB manifests deliberately with an object-size filter, expire current versions on day 2555, and bound incomplete multipart uploads.