Issue/reduce memory usage

[peterdudfield]

Pull Request

Description

• Load data step by step from NWP
• dont load nwp data from the past

How Has This Been Tested?

Ci tests and ran locally

• [ ] 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

[codecov[bot]]

Codecov Report

Merging #44 (a872dd6) into main (e55e0c1) will decrease coverage by 2.06%. The diff coverage is 11.11%.

@@            Coverage Diff             @@
##             main      #44      +/-   ##
==========================================
- Coverage   45.06%   43.00%   -2.06%     
==========================================
  Files          21       21              
  Lines         932      944      +12     
==========================================
- Hits          420      406      -14     
- Misses        512      538      +26     

Impacted Files	Coverage Δ
gradboost_pv/inference/data_feeds.py	36.58% <11.11%> (-3.06%)	:arrow_down:

... and 1 file with indirect coverage changes

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