Add analytics data product freshness guard

[AlonePenguin]

@algora-pbc /claim #20

Summary

• Adds a distinct analytics-data-product-freshness-guard/ module for Revenue Infrastructure.
• Validates recurring licensed analytics data products before monthly billing by checking snapshot age, contracted metric coverage, anonymization thresholds, source-project withdrawal/embargo impacts, reproducibility-score feed freshness, and customer delivery evidence.
• Produces deterministic finance actions to release, credit, defer, or hold invoice release from synthetic data only.

Non-overlap

This avoids existing #20 slices for generic billing, usage metering, payment webhooks/failover, disputes, tax/VAT, FX, quote approval, invoice delivery/collections, storage overage, prepaid compute credits, analytics API usage, analytics seat rosters, customer consolidation, renewal/cancellation, price-escalation, and support entitlement. It focuses only on analytics data-product freshness and completeness before invoice release.

Validation

• npm --prefix analytics-data-product-freshness-guard run check
• npm --prefix analytics-data-product-freshness-guard test
• npm --prefix analytics-data-product-freshness-guard run demo
• npm --prefix analytics-data-product-freshness-guard run verify-video
• git diff --cached --check -- analytics-data-product-freshness-guard

Demo artifact: analytics-data-product-freshness-guard/reports/demo.mp4 (H.264, 960x540, 4s, 18fps).

Synthetic data only. No credentials, live billing, payment processors, private research data, external APIs, payout systems, or financial accounts are used.