fix(ci): replace ISF gh pr create with a job-summary PR link

.github/workflows/opendata-instance-size-flexibility.yml

@@ -15,7 +15,6 @@ on:
 # so the subscription only serves as an API routing scope.
 permissions:
   contents: write
-  pull-requests: write
   id-token: write
 
 jobs:
@@ -45,25 +44,11 @@ jobs:
         shell: pwsh
         run: src/scripts/Update-InstanceSizeFlexibility.ps1
 
-      - name: Create PR if data changed
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          PR_BODY: |
-            ## Summary
-
-            Weekly automated update of instance size flexibility (ISF) ratios from the
-            [Azure Reservations Catalogs API](https://learn.microsoft.com/azure/cost-management-billing/reservations/instance-size-flexibility#extract-instance-size-flexibility-ratios-using-azure-catalogs-api).
-
-            This file maps each ARM SKU to its instance size flexibility group and ratio,
-            replacing the deprecated `AutofitComboMeterData.csv` and `isfratioblob.csv` files
-            that were hosted on `ccmstorageprod.blob.core.windows.net` (retired 30 Aug 2026).
-
-            ## Test plan
-
-            - [ ] Review the diff for unexpected changes (large drops in group/SKU count, etc.)
-            - [ ] Spot-check a few SKUs against the Azure Pricing Calculator
-
-            🤖 Generated by the **Update Instance Size Flexibility** workflow
+      # GitHub Actions is not permitted to open pull requests in this org, so we push
+      # a branch and surface a one-click "create PR" link in the job summary for a
+      # maintainer to open. Opening the PR triggers Open Data CI and normal review.
+      # This mirrors opendata-commitment-eligibility.yml, which hit the same wall.
+      - name: Push branch and surface PR link if data changed
         run: |
           # Check for changes (handles both new file and modified file)
           if git diff --quiet --exit-code -- src/open-data/InstanceSizeFlexibility.csv 2>/dev/null && \
@@ -72,15 +57,50 @@ jobs:
             exit 0
           fi
 
-          BRANCH="opendata/instance-size-flexibility-$(date +%Y%m%d)"
+          # run_number keeps a re-run on the same day from colliding with the branch an
+          # earlier run already pushed; run_attempt does the same for a re-run of this
+          # run, which keeps run_number and only increments the attempt.
+          BRANCH="opendata/instance-size-flexibility-$(date +%Y%m%d)-${{ github.run_number }}.${{ github.run_attempt }}"
           git checkout -b "$BRANCH"
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add src/open-data/InstanceSizeFlexibility.csv
           git commit -m "chore: Update instance size flexibility ratios"
           git push origin "$BRANCH"
 
-          gh pr create \
-            --title "[Open Data] Update instance size flexibility ratios ($(date +'%B %Y'))" \
-            --base dev \
-            --body "$PR_BODY"
+          PR_URL="${{ github.server_url }}/${{ github.repository }}/compare/dev...${BRANCH}?expand=1"
+          {
+            echo "### Instance size flexibility ratios updated"
+            echo ""
+            echo "Pushed branch \`${BRANCH}\`. GitHub Actions cannot open PRs in this repo, so open it manually:"
+            echo ""
+            echo "[**Create pull request →**](${PR_URL})"
+            echo ""
+            echo "Suggested title:"
+            echo ""
+            echo '```'
+            echo "[Open Data] Update instance size flexibility ratios ($(date +'%B %Y'))"
+            echo '```'
+            echo ""
+            echo "Suggested body:"
+            echo ""
+            echo '```markdown'
+            echo "## Summary"
+            echo ""
+            echo "Weekly automated update of instance size flexibility (ISF) ratios from the"
+            echo "[Azure Reservations Catalogs API](https://learn.microsoft.com/azure/cost-management-billing/reservations/instance-size-flexibility#extract-instance-size-flexibility-ratios-using-azure-catalogs-api)."
+            echo ""
+            echo "This file maps each ARM SKU to its instance size flexibility group and ratio,"
+            echo "replacing the deprecated \`AutofitComboMeterData.csv\` and \`isfratioblob.csv\` files"
+            echo "that were hosted on \`ccmstorageprod.blob.core.windows.net\` (retired 30 Aug 2026)."
+            echo ""
+            echo "## Test plan"
+            echo ""
+            echo "- [ ] Review the diff for unexpected changes (large drops in group/SKU count, etc.)"
+            echo "- [ ] Spot-check a few SKUs against the Azure Pricing Calculator"
+            echo ""
+            echo "🤖 Generated by the **Update Instance Size Flexibility** workflow"
+            echo '```'
+          } >> "$GITHUB_STEP_SUMMARY"
+          echo "Branch pushed: $BRANCH"
+          echo "Open a PR here: $PR_URL"