// All queries scoped to current center
const scopedPrisma = createScopedPrisma(centerId);
const members = await scopedPrisma.centerMembership.findMany();
// → WHERE center_id = 'center_123' automatically applied

Actor → CenterMembership (ACTIVE) → Center Data

// ✅ Normal: scoped to current center
const schedules = await scopedPrisma.schedule.findMany();

// ⚠️ Cross-center: explicitly audited
const allCenters = await basePrisma.center.findMany({
  where: { id: { in: authorizedCenterIds } }
});

// Require center scope — throws if not in center context
const { centerId } = requireCenterScope(session);

// Get center scope or error
const result = getCenterScopeOrError(session);