When --enable-assets is set, each file-type output entry in the
`executed` WebSocket message now includes id, name, asset_hash, size,
and mime_type — matching the shape already returned by /upload/image.
The enrichment lives in comfy_execution/asset_enrichment.py (no torch
dependency) and is called from both send sites in execution.py: freshly
executed nodes register the file inline via register_file_in_place;
cached node re-sends look up the existing AssetReference by file path
to avoid re-hashing. Errors are caught per-entry so a failure never
blocks the WS message from sending.
