ci(tck-gfql): restore PYTHONPATH for deselected contract run

Author: lmeyerov

.github/workflows/ci.yml

@@ -375,6 +375,8 @@ jobs:
         echo "- tck-gfql sha: \`${{ steps.tck_gfql.outputs.sha }}\`" >> "$GITHUB_STEP_SUMMARY"
         # Temporary cross-repo lag: pygraphistry now executes match-where3-3,
         # but tck-gfql main still expects a GFQLValidationError for that xfail key.
+        export PYTHONPATH="$(pwd):${PYTHONPATH:+:${PYTHONPATH}}"
+        export PYTHONPATH="${{ github.workspace }}:${PYTHONPATH}"
         pytest tests/cypher_tck -xvs \
           --deselect tests/cypher_tck/test_tck_runner.py::test_direct_cypher_xfail_contract[match-where3-3]
         python -m tests.cypher_tck.report