detectDriver method
Detects the database driver from a connection string.
Returns the driver name (e.g. "sqlserver", "oracle", "postgres") if detected, or null if unknown.
Implementation
Future<String?> detectDriver(String connectionString) async {
final r = await _sendRequest<DetectDriverResponse>(
DetectDriverRequest(_nextRequestId(), connectionString),
);
return r.driverName;
}