[C#] FasterLog.Commit() doesn't save progress of persisted iterators

[mito-csod]

FasterLogScanIterator.CompleteUntil() updates requestedCompletedUntilAddress. However, FasterLogRecoveryInfo.SnapshotIterators() looks at CompletedUntilAddress, not requestedCompletedUntilAddress, so the value never makes its way to persistence. Repro below:

byte[] testBytes1 = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7 };
byte[] testBytes2 = new byte[] { 8, 9, 10, 11, 12, 13, 14, 15 };           
const string iterName = "snowflake";

var settings = new FasterLogSettings
{
	LogDevice = Devices.CreateLogDevice(Environment.CurrentDirectory + "/abc.lf"),
	LogCommitFile = Environment.CurrentDirectory + "/abc.cf"
};

using (var log = new FasterLog(settings))
using (var iter = log.Scan(0, long.MaxValue, iterName))
{
	byte[] readBuf = new byte[128];
	log.Enqueue(testBytes1);
	log.Enqueue(testBytes2);
	log.Commit();
	iter.GetNext(out readBuf, out int len, out long addr);
	iter.CompleteUntil(addr);
	log.Commit();
}

using (var recoveredLog = new FasterLog(settings))
using (var iter = recoveredLog.Scan(0, long.MaxValue, iterName))
{
	byte[] readBuf = new byte[128];
	iter.GetNext(out readBuf, out int len, out long addr);
	/* you would expect readBuf to have {8, 9, 10...} but it has {0, 1, 2...} */
}