Add Eve Contracts to graphql
user
```ruby
# frozen_string_literal: true

module Types
  class EveContractType < Types::BaseObject
    field :id, ID, null: false
    field :buyout, Float, null: true
    field :collateral, Float, null: true
    field :date_expired, GraphQL::Types::ISO8601DateTime, null: true
    field :date_issued, GraphQL::Types::ISO8601DateTime, null: true
    field :days_to_complete, Integer, null: true
    # field :end_location_id, Integer, null: true
    field :for_corporation, Boolean, null: true
    # field :issuer_corporation_id, Integer, null: true
    # field :issuer_id, Integer, null: true
    field :price, Float, null: true
    field :reward, Float, null: true
    # field :start_location_id, Integer, null: true
    field :title, String, null: true
    field :kind, String, null: true
    field :volume, Float, null: true
    # field :region_id, Integer, null: true

    def id
      object.contract_id
    end
  end
end
```
assistant