Shipping a 227 MB database and a 1.9 GB image to the public for $0/month

How PantryAtlas distributes large artifacts on Cloudflare R2 with zero egress fees — the real cost math, why download-cost 'abuse' is bounded by design, the one setting that actually matters, and the gotchas (wrangler's 300 MiB cap, the 512 MB cache ceiling) I hit getting there.