[Cheats] Middleware proxy server for GameHacking.org cheat lookup

[github-actions]

Summary

GameHacking.org is a rich source of cheat codes covering many retro gaming systems, but has no public API. The current implementation (GameHackingOrgLookup.swift) uses an HTML scraper that works but is fragile — it will break if GameHacking.org changes its page structure.

A thin middleware/proxy server would provide:

• Stability: Scraping logic lives server-side; no app update needed when site changes
• Caching: Server-side cache reduces load on GameHacking.org
• Normalization: Consistent JSON response regardless of source site changes
• Future extensibility: Add more cheat sources (NoCash, other sites) without app updates
• Rate limiting: Centralized rate limiting prevents the app from being blocked

Proposed Architecture

The app calls a thin proxy: GET /cheats?title=<title>&system=<slug>

The proxy scrapes GameHacking.org (with 24h server-side cache) and returns a JSON array of cheat entries.

Implementation Notes

• Language: Node.js/Bun, Go, Python, or Cloudflare Workers (recommended)
• Hosting: Cloudflare Workers (free tier ~100k req/day), Fly.io, or JoeMatt's VPS
• Endpoint: GET /cheats?title=<title>&system=<slug> returns JSON cheat array
• Cache: KV store with 24h TTL per (title, system) pair
• App integration: Replace GameHackingOrgLookup with a simple JSON REST call

In-App Fallback

The current in-app HTML scraper (GameHackingOrgLookup.swift, added in #3069) serves as a working fallback until this middleware is deployed. When the middleware is available, the app can prefer it via a PVSettings toggle or remote config flag.

References

• Current in-app scraper: PVLibrary/Sources/PVLibrary/Cheat/GameHackingOrgLookup.swift
• Initial cheat source PR: [Cheats] Extend online cheat lookup: GeckoCodes (GC/Wii), GameHacking.org #3069

Part of #2505