ci: automate S3 cache purge during deployment

.gitea/workflows/deploy.yml

@@ -532,6 +532,29 @@ jobs:
             docker compose -p '${{ needs.prepare.outputs.project_name }}' --env-file $ENV_FILE up -d --remove-orphans
           "
 
+      - name: 🧹 Purge S3 Cache
+        shell: bash
+        run: |
+          echo "Installing rclone..."
+          curl -s -O https://downloads.rclone.org/rclone-current-linux-amd64.deb
+          sudo dpkg -i rclone-current-linux-amd64.deb > /dev/null 2>&1
+
+          echo "Configuring rclone..."
+          cat > rclone.conf <<EOF
+          [mintel-s3]
+          type = s3
+          provider = Other
+          access_key_id = ${{ secrets.S3_ACCESS_KEY || vars.S3_ACCESS_KEY }}
+          secret_access_key = ${{ secrets.S3_SECRET_KEY || vars.S3_SECRET_KEY }}
+          endpoint = ${{ secrets.S3_ENDPOINT || vars.S3_ENDPOINT || 'https://fsn1.your-objectstorage.com' }}
+          region = ${{ secrets.S3_REGION || vars.S3_REGION || 'fsn1' }}
+          EOF
+
+          echo "Purging S3 cache for ${{ env.S3_PREFIX }} ..."
+          rclone --config rclone.conf delete mintel-s3:${{ env.S3_BUCKET }}/${{ env.S3_PREFIX }}/cache/ --include "*" || true
+          
+          rm rclone.conf rclone-current-linux-amd64.deb
+
       - name: 🧹 Post-Deploy Cleanup (Runner)
         if: always()
         run: docker builder prune -f --filter "until=1h"