Các vấn đề về triển khai Subgraph

Several Entities have been changed to @entity(immutable: true), apiVersion changed from 0.0.6 to 0.0.7, specVersion changed from 0.0.4 to 1.2.0 , others did not change. Additionally, removing all eth_calls possible on the subgraph and for the eth_calls which can't be removed, use declared eth_calls. Also, the processing task is in blockHandlers, so 'declared eth_calls' only supports eventHandlers.