immich-machine-learning: add passthru.tests

pkgs/by-name/im/immich-machine-learning/package.nix

@@ -3,6 +3,7 @@
   fetchFromGitHub,
   immich,
   python3,
+  nixosTests,
 }:
 let
   python = python3.override {
@@ -96,6 +97,10 @@ python.pkgs.buildPythonApplication rec {
         --log-config-json $out/share/immich/log_conf.json"
   '';
 
+  passthru.tests = {
+    inherit (nixosTests) immich;
+  };
+
   meta = {
     description = "Self-hosted photo and video backup solution (machine learning component)";
     homepage = "https://immich.app/";