tranquil-pds: add nixos test to passthru

pkgs/by-name/tr/tranquil-pds/package.nix

@@ -5,6 +5,7 @@
   pkg-config,
   openssl,
   protobuf,
+  nixosTests,
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
@@ -34,6 +35,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
   # disable the check phase for now
   doCheck = false;
 
+  passthru.tests = { inherit (nixosTests) tranquil-pds; };
+
   meta = {
     description = "Tranquil ATProto Personal Data Server implementation written in Rust";
     homepage = "https://tangled.org/tranquil.farm/tranquil-pds";