fix: choropleth statistics query with map bounds

[joaquimds]

mapBounds needs to be in the top level of the query variables for fetchMore({ variables: { mapBounds } }) to work.

[linear]

MAP-1024 Output areas not displaying choropleth data

[sentry]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: hub/graphql/types/model_types.py

Function	Unhandled Issue
statistics_for_choropleth	GraphQLError: column hub_genericdata.data_EU Citizens - Total electors (includes attaine_5035d8b9 does not exist ... Event Count: 100
statistics_for_choropleth	GraphQLError: 'Percentage registered' /graphql Event Count: 16
statistics_for_choropleth	GraphQLError: 'variable' /graphql Event Count: 5

📄 File: hub/graphql/types/stats.py (Click to Expand)

Function	Unhandled Issue
statistics	GraphQLError: column hub_genericdata.area_id does not exist ... Event Count: 540
statistics	GraphQLError: column hub_genericdata.data_EU Citizens - Total electors (includes attaine_5035d8b9 does not exist ... Event Count: 100
statistics	GraphQLError: 'Percentage registered' /graphql Event Count: 16
statistics	GraphQLError: 'variable' /graphql Event Count: 12

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[janbaykara]

Fine by me!