Issue/93 metric models

[peterdudfield]

Pull Request

Description

• 93

• 96

• 97

How Has This Been Tested?

Normal CI + new tests

• [x] 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
• [x] 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 #103 (b90ef48) into main (c4d7e01) will decrease coverage by 0.11%. The diff coverage is 97.01%.

@@            Coverage Diff             @@
##             main     #103      +/-   ##
==========================================
- Coverage   98.56%   98.44%   -0.12%     
==========================================
  Files          17       18       +1     
  Lines         836      901      +65     
==========================================
+ Hits          824      887      +63     
- Misses         12       14       +2     

Impacted Files	Coverage Δ
nowcasting_datamodel/models/metric.py	96.82% <96.82%> (ø)
nowcasting_datamodel/__init__.py	100.00% <100.00%> (ø)
nowcasting_datamodel/models/__init__.py	100.00% <100.00%> (ø)
nowcasting_datamodel/models/gsp.py	93.75% <100.00%> (+0.09%)	:arrow_up:
nowcasting_datamodel/update.py	98.63% <100.00%> (ø)

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