Search Payments by Last 4 Digits of Credit Card

🔍 Problem Statement
As a billing admin, I experience being unable to search payments by the last four digits of a credit card, which makes it difficult to match a payment when the cardholder's identity is unknown.

💡 User Story
As a billing admin, I want to search the Payments screen by the last 4 digits of a credit card, so that I can quickly locate a payment when a cardholder contacts us without knowing their account details.

🎯 Definition of Done
- Given the Payments search, when filtering by last 4 card digits, then only payments made with that card are returned.
- This change impacts the UI (Payments search/filter) and API (payment search endpoint — add last4 filter param).
- Limitations: returns all matching cards across customers; no full PAN data is stored or exposed.

What would you like to be able to do? (One idea per form): Search payments by last four of credit card How would that help you?: It would help us find payments when the card holder/finance person doesn't know who the subscription belongs to. How important is this to you?: Important Email address: jessie@millennialservices.com ——————————————— This task was submitted through Suggest an idea https://form.asana.com/?k=qsv6hMm2wL8SXD_R-h-N9Q&d=742417627358732