feat: generate static scores for backtesting

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 92.56%. Comparing base (e351206) to head (abf1739).

Files	Patch %	Lines
numalogic/backtest/_prom.py	87.50%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #355 +/- ## ========================================== - Coverage 92.58% 92.56% -0.02% ========================================== Files 83 83 Lines 4062 4078 +16 Branches 350 352 +2 ========================================== + Hits 3761 3775 +14 - Misses 224 225 +1 - Partials 77 78 +1 ```

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