Behavior: Moves the asset to archival storage, reducing storage costs while preserving the asset for future retrieval. Archived assets are not immediately accessible for streaming or download — they must first be restored using the restore endpoint.

Authorization: Requires a valid Bearer token with file write permissions on the asset.

Side Effects: The asset's storage class is changed to archival. The asset will become unavailable for direct access until restored.

Error Scenarios: Returns 401 if the caller is not authenticated. Returns 403 if the caller does not have write permissions on the asset.