bug: HoldingEscrows does not populate if UpdateAssetPrice received #82
Description
https://etherscan.io/tx/0xeff5e08d7ce65afac9a5c31475c652b59ddfb5afd38177e2dde8fb58b89419d1#eventlog this transaction triggered an UpdateAssetPrice event on the Spoke side.
The indexer MUST populate the HoldingsEscrow with an entry at that point even if no previous entry was available.