feature request: GRT mints, burns and total supply in GraphNetworkDailyData entity

[sahra-karakoc]

Currently, analytics subgraph doesn't track GRT mints, burns and totalSupply. It would be useful to add the following to GraphNetworkDailyData entity :

• fields that track daily changes (similar to netDailyDelegatedTokens field of the IndexerDailyData entity), and/or
• fields that track cumulative values (similar to totalTokensStaked field of the GraphNetworkDailyData entity).

If we have to choose between the two, it might make more sense to go with the cumulative values since it is easier to calculate daily changes from cumulative values than the reverse.