Forces a specific edge/browser TTL for URLs whose path contains a given string, overriding whatever the origin's own CDN-Cache-Control header says for that request — use it for a temporary override, not as the primary way to tune caching (the origin already sets sensible per-content-type defaults).

Loops through every media item in the library and requests each of its edge assets once, so the first real visitor hits a warm cache (HIT) instead of a cold one (MISS). Runs one file at a time — safe to stop partway through and resume later.