Add weighted risk score to CMS HCC

[sarah-tuva]

Is your feature request related to a problem? Please describe.

Background from research:

There are two ways of aggregating risk scores: one in which risk scores are weighted by the number of months the member was active during the period in question, and one in which they are weighted by the risk-based revenue earned over those active months. Both ways are appropriate in different contexts, and it is important to remember which is being used, as results will differ slightly.

The Tuva Data Model has the necessary data points to create a weighted risk score by member months for that patient. This would help with better analysis

Describe the solution you'd like

Add a weighted risk score based on the patient's member months to the patient_risk_score final table.

Describe alternatives you've considered

None.

Additional context

None.