Returns a single vendor card by id, including its current limits, allocations,
and balances. Visible to admins, holders of the vendor_cards_view /
vendor_cards_manage permission, or the cardholder the card belongs to.

In addition to the base card fields, the detail response exposes computed
fields not present on the list endpoint:
spent_in_interval_with_limit_currency, vendor_max_spending_limits,
vendor_max_allocation, non_sensitive_information,
last_allocation_transaction_status, last_allocation_transaction_created_at,
and allocation_priority_stats. When the caller can read the company balance,
company_expendable_balance_in_limit_currency is also included. The sensitive
vendor_data blob is always excluded — use the retrieve endpoint for PAN/CVC.