Refactor

[dfulu]

Pull Request

Description

A medium refactor of the code which keeps all of same the functionality and user facing APIs of the old code

Extra fixes:

1. We use elevation from the batch to compute night time masks. The elevation values from ocf-data-sampler are 0-1 scaled whilst the elevation values from ocf_datapipes are standardised. A fix for this, including legacy flag was added
2. In the pvnet pipeline in ocf_datapipes with the production flag switched on, when satellite data is missing we allow linear interpolation to fill gaps of a few steps. This is not included in ocf-data-sampler. We move this satellite interpolation into the app. This will work with both the legacy and new dataloader, and having this step in the app gives us the opportunity to take more care in the interpolation and monitor this step more closely

Closes #131

Checklist:

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

[peterdudfield]

Perhaps double checking it still works if there is no satellite data at all.

This is our back up where we just run tge ecmwf model only

[dfulu]

Perhaps double checking it still works if there is no satellite data at all.

This is our back up where we just run tge ecmwf model only

I've added a test for the case where there is no satellite data available