Issue/pv read

[peterdudfield]

Pull Request

Description

add read function for pv yields add tests

Fixes #

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

[codecov-commenter]

Codecov Report

Merging #36 (5c48cdd) into main (40cd43c) will decrease coverage by 0.10%. The diff coverage is 94.73%.

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   97.92%   97.81%   -0.11%     
==========================================
  Files          16       16              
  Lines         577      595      +18     
==========================================
+ Hits          565      582      +17     
- Misses         12       13       +1     

Impacted Files	Coverage Δ
nowcasting_datamodel/read/read_pv.py	98.18% <94.44%> (-1.82%)	:arrow_down:
nowcasting_datamodel/__init__.py	100.00% <100.00%> (ø)

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