fix: handle missing pr-number artifact gracefully

- Add if_no_artifact_found: warn to prevent job failure
- Add continue-on-error to artifact download step
- Check for pr-number.txt existence before reading
- Skip bot execution if no PR number found
- Only run if workflow_run conclusion is success

Author: agronetlabs

.github/workflows/auto-review-bot.yml

@@ -10,22 +10,31 @@ jobs:
   auto-review-bot:
     runs-on: ubuntu-latest
     name: Run
+    if: github.event.workflow_run.conclusion == 'success'
     steps:
       - name: Fetch PR Number
         uses: dawidd6/action-download-artifact@246dbf436b23d7c49e21a7ab8204ca9ecd1fe615
+        continue-on-error: true
         with:
           name: pr-number
           workflow: auto-review-trigger.yml
           run_id: ${{ github.event.workflow_run.id }}
+          if_no_artifact_found: warn
 
       - name: Save PR Number
         id: save-pr-number
-        run: echo "pr=$(cat pr-number.txt)" >> $GITHUB_OUTPUT
+        run: |
+          if [ -f pr-number.txt ]; then
+            echo "pr=$(cat pr-number.txt)" >> $GITHUB_OUTPUT
+          else
+            echo "pr=" >> $GITHUB_OUTPUT
+          fi
 
       - name: Auto Review Bot
         id: auto-review-bot
         uses: ethereum/eip-review-bot@dist
         continue-on-error: true
+        if: steps.save-pr-number.outputs.pr != ''
         with:
           token: ${{ secrets.TOKEN }}
           config: config/eip-editors.yml