Add revenue dunning entitlement hold guard

[vondutchi]

/claim #20

Summary

• Add revenue-dunning-entitlement-hold-guard/, a distinct Revenue Infrastructure slice for deciding when failed-payment accounts should continue grace, route to finance exception handling, or hold risky entitlements.
• Validate retry windows, dunning notice cadence, entitlement grace periods, institutional invoice exceptions, AI compute-credit hold safety, and analytics-license export holds.
• Emit deterministic reviewer artifacts in JSON, Markdown, SVG, and MP4 form using synthetic data only.

Scope Boundaries

This is synthetic demo data only. It does not call payment providers, banks, wallets, billing systems, ERP systems, private accounts, credentials, or SCIBASE production services.

This scope is intentionally separate from existing #20 slices such as broad billing ledgers, usage metering, receipt privacy, grant cost-share controls, sanctions/export checks, quote approval, seat rosters, payment authorization, customer consolidation, revenue recognition, or general revenue dashboards.

Demo

• revenue-dunning-entitlement-hold-guard/reports/demo.mp4

Validation

• node revenue-dunning-entitlement-hold-guard/test.js
• node revenue-dunning-entitlement-hold-guard/demo.js
• node revenue-dunning-entitlement-hold-guard/render-video.js
• ffprobe confirmed H.264, 960x540, 5 seconds, 120 frames for the demo MP4.
• node --check revenue-dunning-entitlement-hold-guard/index.js
• node --check revenue-dunning-entitlement-hold-guard/sample-data.js
• node --check revenue-dunning-entitlement-hold-guard/test.js
• node --check revenue-dunning-entitlement-hold-guard/demo.js
• node --check revenue-dunning-entitlement-hold-guard/render-video.js
• git diff --cached --check

No payout details, secrets, tokens, cookies, or private account information are included in this PR.