GraphQL: Optimize queries, fixes some null returns (on object), fix stitched GraphQLUpload (#6709)
* Optimize query, fixes some null returns, fix stitched GraphQLUpload * Fix authData key selection * Prefer Iso string since other GraphQL solutions use this format * fix tests Co-authored-by: Antonio Davi Macedo Coelho de Castro <adavimacedo@gmail.com>
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