feat: download archive

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/flux-releaser/tests/publish_artifacts.rs

@@ -231,8 +231,6 @@ async fn can_trigger_latest_release() -> anyhow::Result<()> {
     // 2. Verify that we've splatted the flux cluster over the upstream registry
     // 3. Verify database has a release record
 
-    todo!();
-
     Ok(())
 }