On the covid-19 branch, add the following info:

class Spot:

• property covidWard type boolean (checkbox)

class Employee:

• property covidRiskType type enum CovidRiskType (combobox)

new enum CovidRiskType:

• Inoculated
• Low
• Moderate
• High
• Extreme

4 new constraints:

• if Shift assigns an employee with riskType low to covidWard, 1 soft score penalty
• if Shift assigns an employee with riskType Moderate to covidWard, 5 soft score penalty
• if Shift assigns an employee with riskType High to covidWard, 10 soft score penalty
• if Shift assigns an employee with riskType Extreme to covidWard, 1 hard score penalty

Ideally, those are configurable through ConstraintWeights (nice to have, not vital for first demo).