Generation Nans

[confusedmatrix]

Pull Request

Passes Nans to model when wind generation data does not exist for the given time period.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] Yes

If your changes affect data processing, have you plotted any changes? i.e. have you done a quick sanity check?

• [ ] Yes

Checklist:

• [ ] My code follows OCF's coding style guidelines
• [ ] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have checked my code and corrected any misspellings

[confusedmatrix]

@peterdudfield The model doesn't seem like being passed Nans (or zeros for that matter). Get the following error:

File "/Users/chris/Library/Caches/pypoetry/virtualenvs/india-forecast-app-_WmL7Pf1-py3.11/lib/python3.11/site-packages/pvnet/models/multimodal/multimodal.py", line 334, in forward
    id = x[BatchKey[f"{self._target_key_name}_id"]][:, 0].int()
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
IndexError: index 0 is out of bounds for dimension 1 with size 0