fix: disable artifact upload in plan workflow

.gitea/workflows/terraform-plan.yml

@@ -81,8 +81,7 @@ jobs:
             exit 1
           fi
 
-      - name: Upload Terraform Plan
+      # NOTE: Disabled artifact upload for now.
-        uses: actions/upload-artifact@v3
+      # On this Gitea/act runner, post-job hooks from artifact actions can
-        with:
+      # fail during "Complete job" even when all Terraform steps succeeded.
-          name: terraform-plan
+      # Re-enable once runner/action compatibility is confirmed.
-          path: terraform/tfplan