Struct EmbeddedAsset 

pub struct EmbeddedAsset {
    pub data: Cow<'static, [u8]>,
    pub content_type: String,
    pub etag: Option<String>,
    pub last_modified: Option<u64>,
}

A single embedded file’s payload + metadata. Mirrors what rust_embed::File exposes, but kept framework-owned so the runtime API stays stable if we later swap the embedder.

Fields

data: Cow<'static, [u8]>

content_type: String

MIME type. Caller is expected to pre-resolve this (e.g. via mime_guess::from_path) so the framework doesn’t have to guess.

etag: Option<String>

Optional strong validator. When present, the framework emits an ETag header and short-circuits matching If-None-Match requests with 304.

last_modified: Option<u64>

Optional Unix-seconds last-modified timestamp from the embedder.