asset_id: <source>.<asset_type>.<category>.<asset_id>
source: <source>
source_asset_id: <upstream_asset_id>
asset_type: <asset_type>
category: <category>
format: <format>
entry_file: <relative_entry_file>
license: <license>
origin_url: <origin_url>
path: assets/<source>/raw/<asset_type>/<category>/<asset_id>
storage_mode: raw
readiness_level: <L0|L1_candidate|L2_candidate|L3|L4|L5|unknown>
validation_status: pending
tags:
  - <source>