Method publish_pulled_event

crates/openshell-driver-vm/src/driver.rs:3599–3614

Emit a `Pulled` platform event with progress metadata for the CLI.

(&self, sandbox_id: &str, image_ref: &str, image_path: &Path)

    /// Emit a `Pulled` platform event with progress metadata for the CLI.
    async fn publish_pulled_event(&self, sandbox_id: &str, image_ref: &str, image_path: &Path) {
        let mut metadata = HashMap::from([("image_ref".to_string(), image_ref.to_string())]);
        let size_suffix = tokio::fs::metadata(image_path).await.map_or_else(
            |_| String::new(),
            |meta| {
                metadata.insert("image_size_bytes".to_string(), meta.len().to_string());
                format!(" Image size: {} bytes.", meta.len())
            },
        );
        self.publish_vm_progress(
            sandbox_id,
            "Pulled",
            format!("Successfully pulled image \"{image_ref}\".{size_suffix}"),
            metadata,
        );
    }
}

struct DownloadedRegistryLayer {