ci: add upterm for debugging

Author: apotterri

.github/workflows/solve.yml

@@ -301,3 +301,9 @@ jobs:
             logs/
             predictions.jsonl
             results.csv
+      - name: Setup upterm session
+        uses: owenthereal/action-upterm@v1
+        with:
+          limit-access-to-actor: true # Restrict to the user who triggered the workflow
+          wait-timeout-minutes: 5
+