Update contextHelper.ts

[anitarodia]

Source priority fix

[fernando-delosrios-sp]

Hi Animesh,

Thanks for the PR. I was checking the code and it beats me why we would need to sort the authoritative sources when there's a dedicated function, listSourceAccounts, that iterates through the source list from the config before processing attributes. Authoritative accounts come from a joint query including all configured sources. I'd like to better understand where the error in my logic is.

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