feat: Domain YAML-Regeln (14 Regeln) + Field-Resolver fuer HR/Edu/HC
1. 14 neue YAML-Regeln in Kategorie K (Domain-Hochrisiko):
- HR: 5 Regeln (Screening, Absagen=BLOCK, AGG, Bias, Performance)
- Education: 3 Regeln (Noten, Minderjaehrige=BLOCK, Zugangssteuerung)
- Healthcare: 4 Regeln (Diagnose, Triage, MDR=BLOCK, Gesundheitsdaten)
2. Field-Resolver: getHRContextValue(), getEducationContextValue(), getHealthcareContextValue()
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>