fix(subgraph): correctly derive votes field in classic round

Author: alcercu

subgraph/schema.graphql

@@ -24,6 +24,7 @@ interface DisputeKitDispute {
 interface DisputeKitRound {
   id: ID!
   localDispute: DisputeKitDispute!
+  votes: [Vote!]! @derivedFrom(field: "localRound")
 }
 
 interface Vote {
@@ -185,8 +186,8 @@ type ClassicDispute implements DisputeKitDispute @entity {
 type ClassicRound implements DisputeKitRound @entity {
   id: ID! # disputeKit.id-coreDispute-dispute.rounds.length
   localDispute: DisputeKitDispute!
+  votes: [Vote!]! @derivedFrom(field: "localRound")
 
-  votes: [ClassicVote!]!
   winningChoice: BigInt!
   counts: [BigInt!]!
   tied: Boolean!

subgraph/src/entities/ClassicRound.ts

@@ -13,7 +13,6 @@ export function createClassicRound(
   const id = `${localDisputeID}-${roundIndex.toString()}`;
   const classicRound = new ClassicRound(id);
   classicRound.localDispute = localDisputeID;
-  classicRound.votes = [];
   classicRound.winningChoice = ZERO;
   classicRound.counts = new Array<BigInt>(choicesLength.toI32()).fill(ZERO);
   classicRound.tied = true;
@@ -42,6 +41,7 @@ export function updateCounts(id: string, choice: BigInt): void {
       round.tied = false;
     }
   }
+  round.totalVoted = round.totalVoted.plus(ONE);
   round.save();
 }