Feature request: track stable-targeted PRs (like backports) against stable branches

[acid-bong]

Example: NixOS/nixpkgs#414871

Expected behaviour: https://nixpk.gs/pr-tracker.html?pr=414871
Here stable branches are displayed.

Actual behaviour:

$ nick 414871
[414871] [Backport staging-25.05] cpython: 3.13.3 -> 3.13.4; 3.12.10 -> 3.12.11; 3.11.12 -> 3.11.13; 3.10.17 -> 3.10.18
Merged 8 days 13 hours 21 minutes and 44 seconds ago (2025-06-14T02:35:11+00:00), 6 days 2 hours 47 minutes and 48 seconds after creation.
master: 🚫
staging: 🚫
staging-next: 🚫
nixpkgs-unstable: 🚫
nixos-unstable-small: 🚫
nixos-unstable: 🚫

[bryango]

I am trying to add this in the following PR:

• feat: support tracking stable branches #14