Consolidate all branch migrations into 0002_merge_to_asset_references.
Drops old tables (asset_info_meta, asset_info_tags, asset_cache_state,
assets_info), truncates assets, and creates the new unified schema
(asset_references, asset_reference_tags, asset_reference_meta).
Amp-Thread-ID: https://ampcode.com/threads/T-019c5005-66e9-719f-94df-ebb4b25bcf14
Co-authored-by: Amp <amp@ampcode.com>
