Add analytics API license usage guard

[ethanmillerinvestments-code]

Summary

• Adds a dependency-free analytics API license usage guard for the Revenue Infrastructure bounty area.
• Validates paid analytics API customers before graph metadata queries are served or billed by checking license tier, active status, dataset and topic entitlements, anonymization thresholds, private content, monthly quotas, burst limits, and overage authorization.
• Emits allow, block, throttle, and overage decisions plus JSON, Markdown, SVG, and MP4 reviewer artifacts.

Non-overlap

This is not a generic billing, metering ledger, tax, dispute, SLA, royalty, forecast, FX, plan migration, procurement, invoice acceptance, sanctions/export-control, payment failover/webhook, trial/promotion, storage overage, account transfer, collections, or prepaid compute credit breakage slice.

It focuses specifically on paid analytics API license usage and query entitlement gating for graph metadata access.

Validation

• npm run check
• npm test
• npm run demo
• ffprobe -v error -show_entries format=duration,size -show_entries stream=codec_name,width,height,pix_fmt -of default=noprint_wrappers=1 reports/demo.mp4
• git diff --check
• git diff --cached --check

/claim #20

[ethanmillerinvestments-code]

/claim #20