Fix test resources and List type handling in test_dl_tensorflow

[Harshakamalur]

Summary

Fixes #630

This PR fixes the previously skipped test_dl_tensorflow test by addressing both issues mentioned in the issue: missing test resources and type errors with nested lists.

Changes

• python/src/pywy/tests/test_dl.py

  • Removed @pytest.mark.skip decorator
  • Replaced hardcoded /var/www/html/ paths with importlib.resources pointing to proper bundled test resources
  • Fixed incorrect type annotation: floats: List[List[int]] → List[List[float]]

• python/src/pywy/types.py

  • Fixed typecheck() to use get_origin() instead of isinstance() for correct handling of nested generic types like List[List[float]]
  • isinstance(input_type, List) does not work for typing generics; get_origin(input_type) is list is the correct approach

Test Result

The test now runs and successfully constructs the full computation plan. The ConnectionError at the end is expected behavior, executing the plan requires a running Wayang backend server, which is outside the scope of this fix.

Future Improvements

• The ConnectionError at execution time could be addressed in a follow-up by mocking the backend connection or adding a @pytest.mark.integration marker to separate unit and integration tests.

Related

Closes #630

[Harshakamalur]

Hi @apache/wayang-committers, I've submitted this PR to fix #630. Could you please assign this to me and approve the workflows so the CI can run?