Stop the service test failing on its own success

schtasks reports "no such task" by exiting non-zero, which is the condition the
uninstall check is looking for; pwsh then carried that exit code out of the step
and failed the job. Check $LASTEXITCODE explicitly instead.

Author: Nahom-digital

.github/workflows/ci.yml

@@ -66,10 +66,17 @@ jobs:
           schtasks /Query /TN colabapi
           colabapi service status
           colabapi service uninstall
-          if (schtasks /Query /TN colabapi 2>$null) {
-            Write-Error "task still present after uninstall"; exit 1
+          # A missing task is what we WANT here, and schtasks reports that by
+          # exiting non-zero. pwsh would otherwise carry that last exit code out
+          # of the step and fail the job for succeeding, so check it explicitly
+          # and finish on an exit code we choose.
+          schtasks /Query /TN colabapi 2>$null | Out-Null
+          if ($LASTEXITCODE -eq 0) {
+            Write-Error "task still present after uninstall"
+            exit 1
           }
           Write-Host "scheduled task installed, queried, and removed cleanly"
+          exit 0
         shell: pwsh
 
       - name: systemd unit installs (Linux only)