List CMKs

Response example: { "cmks": [ { "id": "550e8400-e29b-41d4-a716-446655440000", "provider": "aws", "resource": "arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012", "status": "current", "created_at": "2025-01-15T10:30:00Z", "updated_at": "2025-01-15T10:30:00Z" } ] }