Stock Photo APIs

Integrates the Unsplash, Pexels, and Pixabay APIs in code — auth, search endpoints, rate limits, attribution, hotlinking versus caching rules, and the compliance obligations that get apps deactivated when skipped. Use when someone says "integrate the Unsplash API", "pull images from Pexels in my app", "build an image picker on a stock photo API", "how do I trigger the Unsplash download endpoint", or is wiring stock…