Subgraph: Fixes parsing of negative int for TokenAmountDifference#249

ethereumdegen merged 7 commits intodevelopteller-protocol/teller-protocol-v2:developfrom

subgraph/pools-subgraph-liquidation-amountteller-protocol/teller-protocol-v2:subgraph/pools-subgraph-liquidation-amountCopy head branch name to clipboard