Fix COUNT operation on view group aggregate header (#9789)

Fixes
[sentry](https://twenty-v7.sentry.io/issues/6235128210/?referrer=discord&notification_uuid=898a081c-f8c7-42b8-b598-7660470a1975&alert_rule_id=15135099&alert_type=issue)

In a [previous work](https://github.com/twentyhq/twenty/pull/9749) I set
the default field to run totalCount aggregate operation on to the "name"
field, which I was wrong think was present on all objects.

packages/twenty-server/src/engine/api/graphql/workspace-schema-builder/utils/get-available-aggregations-from-object-fields.util.ts

@@ -3,6 +3,7 @@ import { GraphQLISODateTime } from '@nestjs/graphql';
 import { GraphQLFloat, GraphQLInt, GraphQLScalarType } from 'graphql';
 import {
   capitalize,
+  FIELD_FOR_TOTAL_COUNT_AGGREGATE_OPERATION,
   FieldMetadataType,
   isFieldMetadataDateKind,
 } from 'twenty-shared';
@@ -176,7 +177,7 @@ export const getAvailableAggregationsFromObjectFields = (
       totalCount: {
         type: GraphQLInt,
         description: `Total number of records in the connection`,
-        fromField: 'id',
+        fromField: FIELD_FOR_TOTAL_COUNT_AGGREGATE_OPERATION,
         fromFieldType: FieldMetadataType.UUID,
         aggregateOperation: AGGREGATE_OPERATIONS.count,
       },