Add revenue:: tag namespace for monetization analysis

[chrmod]

Summary

Introduces a revenue:: tag namespace that marks the commercial function a third party performs — the role it plays in how a website makes money (ads, sales, subscriptions, donations). This enables monetization analysis of websites (e.g. on top of WhoTracks.Me data) as an axis orthogonal to the existing category taxonomy, which stays untouched.

• Tags describe the vendor's factual mechanism (payment-processor, ad-exchange, paywall), never an inferred site business model — that inference belongs in the downstream analysis layer.
• Tags are multi-valued and live in the existing optional tags field on pattern files, so no schema or consumer changes are needed.

Changes

• Tag 388 existing patterns with their revenue role (ad exchanges, ad networks, header bidding, affiliate networks, retargeting, ad verification, product ops, …).
• Add ~175 new patterns with matching organizations for vendors not yet in the database: payment processors and BNPL providers, subscription/membership platforms, paywalls, donation and fundraising platforms, affiliate/partner tracking, and review/social-proof widgets.
• Document the vocabulary and authoring rules in docs/revenue-tags.md.

Test plan

• Load the exported database and verify tagged patterns (e.g. Stripe, PubMatic, Patreon) expose their revenue:: tags.
• Spot-check a site using one of the newly added vendors (e.g. a Donorbox-powered donation page) and confirm the tracker is detected and attributed to the right organization.