- TestPNGScriptChunkNaming (no Docker) and TestStoreScriptChunkPNG (Postgres)
pin the todo exploit: a decodable PNG with a script tEXt chunk uploaded in
image mode as x.html is stored and served as .png, bytes unchanged
- storage deploy note separates static servers (nosniff, nginx extension
allow-list, 404 otherwise) from public buckets, which send the stored
sniffed Content-Type; attachments.md points to it