Tier 2: Add Property-Based Testing with fast-check

[raifdmueller]

Context

As identified in the Risk Radar Assessment, both modules (scripts and website) are Tier 2 and require Tier 2 extended assurance measures.

Measure: Property-Based Tests

Type: Probabilistic
Status: ❌ Missing
Required for: Tier 2 — Extended Assurance

What to implement

1. Install fast-check: npm install -D fast-check
2. Create property-based tests for key functions
3. Add to CI test suite

Reference

• Risk Radar Documentation
• Tier 2 Mitigations
• fast-check Documentation

Acceptance Criteria

• fast-check installed in website module
• At least 3 property-based tests written
• Tests run as part of npm test
• Tests cover critical functions (data loading, search, routing)