IDatastreamStore getLatestVersionEntry default function assumes sorted query

[lemonman96]

Output from selectEntries is not guaranteed to be sorted and this function assumes it is:

osh-core/sensorhub-core/src/main/java/org/sensorhub/api/datastore/obs/IDataStreamStore.java

Lines 106 to 117 in 0c3bae2

	public default Entry<DataStreamKey, IDataStreamInfo> getLatestVersionEntry(String sysUID, String outputName)
	{
	var entryOpt = selectEntries(new DataStreamFilter.Builder()
	.withSystems()
	.withUniqueIDs(sysUID)
	.done()
	.withOutputNames(outputName)
	.build())
	.findFirst();
	return entryOpt.isPresent() ? entryOpt.get() : null;
	}

This results in stale datastreams being returned for some drivers (observed via the postgis driver). We will need a max query here.