MNT: Prepend src for the coverage path

Prepend `src` for the coverage path; otherwise, the coverage of the
modules `analysis.featuring.py`, `analysis.filtering.py`, and
`cli.run.py` are reported to be 0%, even if there they are covered
extensively by existing tests.

Author: jhlegarreta

tox.ini

@@ -41,7 +41,7 @@ commands_pre =
   uv pip install datalad
   uv tool install --with-executables-from=datalad-osf,datalad-next datalad
 commands =
-  pytest -sv --doctest-modules --cov niquery --cov-report xml \
+  pytest -sv --doctest-modules --cov src/niquery --cov-report xml \
   --junitxml=test-results.xml -v src test {posargs:-n auto}
 
 [testenv:docs]