Mixed HDFS and Ozone paths cause exchange manager configuration failure

Specifying both HDFS (hdfs://) and Ozone (ofs://) paths in the exchange.base-directories parameter causes configuration validation failure. Only one storage backend can be used at a time for exchange data spooling.

Configure exchange.base-directories to use only one storage type. For HDFS, use hdfs:/// schema paths and set exchange-manager.name=hdfs. For Ozone, use ofs:/// schema paths and set exchange-manager.name=hdfs. For local filesystem, use file:/// schema and set exchange-manager.name=local.