* fix(plaid): don't request liabilities on non-liability links
Plaid's Link flow filters out any institution that doesn't support every
product in the link token's requested + additional-consented set. Sure always
requested 'liabilities' as an additional consented product for every account
type, which hides investment-only institutions like E*TRADE (ins_129473) that
don't offer Plaid's liabilities product.
Only include 'liabilities' when the account being linked is itself a liability
(CreditCard/Loan). Investment and Depository links no longer force it, so
E*TRADE and similar institutions become linkable.
* docs(plaid): document product-selection methods
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Co-authored-by: terafin <terafin@users.noreply.github.com>