Require current deploy to run nightly tests

.github/workflows/nightly.yml

@@ -12,10 +12,30 @@ on:
     - cron: 0 0 * * *
   # Allow running manually
   workflow_dispatch:
+  push:
+    branches:
+      - plt-4246-nightly-tests
 
 jobs:
+  check-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check deploy
+        run: |
+          CURRENT_DEPLOY=$(curl -L \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}"\
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/input-output-hk/marlowe-cardano/actions/workflows/deploy.yml/runs\?per_page\=1\&branch\=main\&status\=success | jq --raw-output '.workflow_runs[0].head_sha')
+          if [ $CURRENT_DEPLOY != $GITHUB_SHA ];
+          then
+            echo "Unable to run nightly tests on $GITHUB_SHA, currently deployed commit is $CURRENT_DEPLOY"
+            exit 1
+          fi
+
   marlowe-finder:
     runs-on: ubuntu-latest
+    needs: [check-deploy]
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -55,8 +75,10 @@ jobs:
             :
           done
           result/bin/marlowe-finder --end-at-tip
+
   marlowe-scaling:
     runs-on: ubuntu-latest
+    needs: [check-deploy]
     steps:
       - name: Checkout
         uses: actions/checkout@v3