test(alarms): probe writes evidence log to PROBE_LOG file

src/ZB.MOM.WW.MxGateway.Worker.Tests/Probes/AlarmSubtagLiveSmokeTests.cs

@@ -175,13 +175,22 @@ public sealed class AlarmSubtagLiveSmokeTests
         done.Wait();
         thread.Join();
 
+        List<string> lines = new List<string>();
         output.WriteLine(string.Format("Captured {0} log line(s):", log.Count));
         string? line;
         while (log.TryDequeue(out line))
         {
             output.WriteLine(line);
+            lines.Add(line);
         }
 
+        // Also persist to a file so the evidence survives shell-logger quirks
+        // when run over SSH. Path overridable via PROBE_LOG.
+        string logPath = Environment.GetEnvironmentVariable("PROBE_LOG")
+            ?? System.IO.Path.Combine(System.IO.Path.GetTempPath(), "alarm-subtag-probe.log");
+        try { System.IO.File.WriteAllLines(logPath, lines); }
+        catch (Exception writeEx) { output.WriteLine("probe-log write failed: " + writeEx.Message); }
+
         if (threadException != null)
         {
             throw threadException;