Formatted duration columns sort alphabetically instead of numerically

[erikdarlingdata]

Problem

Several DataGrid columns that display formatted durations (mixing units like "450 ms", "1.2 s", "3.5 min") sort alphabetically instead of numerically because they lack a SortMemberPath pointing to the underlying numeric property.

PR #452 fixed this for the Collection Health tabs. The same issue exists in other grids:

Affected columns

File	Column	Formatted Property	Numeric Property
Lite/Controls/ServerTab.xaml ~line 945	Wait Time (waits grid)	WaitTimeFormatted	WaitTimeMs
Lite/Controls/ServerTab.xaml ~line 1065	Wait Time (latches grid)	WaitTimeFormatted	WaitTimeMs
Lite/Controls/ServerTab.xaml ~line 1186	Current Duration (QS anomalies)	CurrentDurationFormatted	CurrentDurationSeconds
Lite/Controls/ServerTab.xaml ~line 1189	Avg Duration (QS anomalies)	AvgDurationFormatted	AvgDurationSeconds
Lite/Controls/ServerTab.xaml ~line 1192	P95 Duration (QS anomalies)	P95DurationFormatted	P95DurationSeconds
Lite/Controls/ServerTab.xaml ~line 1406	Total Wait (daily summary)	TotalWaitFormatted	TotalWaitTimeSec
Lite/Windows/WaitDrillDownWindow.xaml ~line 83	Elapsed Time	ElapsedTimeFormatted	(string from DB — may need a numeric backing property added)

Fix

Same pattern as PR #452 — add SortMemberPath="<NumericProperty>" to each DataGridTextColumn. For ElapsedTimeFormatted, a numeric backing property may need to be added to the model first since it's currently stored as a pre-formatted string.

Context

Found during review of PR #452 by @dphugo.

[erikdarlingdata]

Closed by PR #457 (merged to dev)