feat(control-instance): Check task state before running command

.github/workflows/control-instance.yml

@@ -114,6 +114,39 @@ jobs:
 
             `${{ steps.command.outputs.command_name }}` command failed because **${{ steps.define.outputs.instance_name }}** instance does not exist.
 
+      - name: Check if server action already in progress
+        id: check_task_state
+        run: |
+          export OS_CLOUD=BIO180006_IU # Select openstack auth settings defined in ".config/openstack/clouds.yaml"
+
+          source ~/venv/bin/activate
+
+          task_state=$(openstack server show instance-30 -f json | \
+            jq -r '.["OS-EXT-STS:task_state"]')
+
+          echo "task_state [$task_state]"
+          echo "task_state=$task_state" >> $GITHUB_OUTPUT
+
+          if [[ "$task_state" != "null" ]]; then
+              echo "::error ::Server action already in progress. Task state is '$task_state'."
+              exit 1
+          fi
+        env:
+          INSTANCE_NAME: ${{ steps.define.outputs.instance_name }}
+
+      - name: comment (server action already in progress)
+        if: ${{ steps.check_task_state.outcome == 'failure' && failure() }}
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            ### Command Results ❌
+
+            `${{ steps.command.outputs.command_name }}` command failed to be applied to **${{ steps.define.outputs.instance_name }}** instance.
+            A server action is already in progress. Task state is `${{ steps.check_task_state.outputs.task_state }}`.
+
+            See details at https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
+
       - name: Execute command
         id: execute_command
         if: