probe: green harness step, a subset of the corpus (throwaway, #232)

.gitea/workflows/release.yml

@@ -59,11 +59,11 @@ jobs:
 
       - name: Real documents
         if: steps.version.outputs.skip != 'true'
-        # Red on purpose: no test matches the keyword, so pytest exits 5.
+        # Green on purpose: a small subset of the corpus, to keep the probe short.
         run: |
           set -eu
           cd tools
-          .venv/bin/python -m pytest -c pytest.ini ../testfiles/harness -q -k does_not_exist_probe
+          .venv/bin/python -m pytest -c pytest.ini ../testfiles/harness -q -k "nist or ifg"
 
   release:
     needs: converters