Add SPANK plugin symlink test to CI

Test that chroot.so and spanknccldebug.so symlinks exist in /usr/lib/slurm/
for slurm_check_job, login_sshd, and worker_slurmd images.

This test should fail until the fix is applied to install scripts.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: theyoprst

.github/workflows/one_job.yml

@@ -300,6 +300,44 @@ jobs:
           echo "Removing jail rootfs tar archive to speedup further docker builds."
           rm -f images/jail_rootfs*.tar
 
+      - name: Test SPANK plugins are accessible
+        shell: bash
+        run: |
+          UNSTABLE=${{ steps.read-version.outputs.unstable }}
+          IMAGE_VERSION="$(make get-image-version UNSTABLE=${UNSTABLE})"
+          if [[ "$UNSTABLE" == "true" ]]; then
+            IMAGE_REPO="cr.eu-north1.nebius.cloud/soperator-unstable"
+          else
+            IMAGE_REPO="cr.eu-north1.nebius.cloud/soperator"
+          fi
+
+          echo "=== Testing SPANK plugin symlinks ==="
+
+          test_plugin_symlink() {
+            local image=$1
+            local plugin=$2
+            local full_image="${IMAGE_REPO}/${image}:${IMAGE_VERSION}"
+
+            if ! docker run --rm --entrypoint test "${full_image}" -e "/usr/lib/slurm/${plugin}"; then
+              echo "FAIL: ${image} missing /usr/lib/slurm/${plugin}"
+              return 1
+            fi
+            echo "  OK: ${image} has /usr/lib/slurm/${plugin}"
+          }
+
+          # Test chroot.so symlink in all slurm images
+          for image in slurm_check_job login_sshd worker_slurmd; do
+            test_plugin_symlink "${image}" "chroot.so"
+          done
+
+          # Test spanknccldebug.so symlink (only in login_sshd and worker_slurmd)
+          for image in login_sshd worker_slurmd; do
+            test_plugin_symlink "${image}" "spanknccldebug.so"
+          done
+
+          echo ""
+          echo "All SPANK plugin symlink tests passed!"
+
   build-helm-charts:
     needs: [changes, pre-build]
     if: needs.changes.outputs.should_build == 'true'