Bar charts only need to request one historical value because they can only show one spectrum at a time.

[akhenry]

Summary

Our bar chart view issues an historical request on load in order to populate the chart with the latest data. Because of the nature of bar charts, we only show data for the latest timestamp, so there is no value in retrieving anything older.

We should add "size=1" to our default request options in BarGraphView.vue.

This is tickling a Yamcs bug which is causing major performance issues, so I am assigning it a higher priority than I normally would for what is otherwise an optimization.

[akhenry]

Verified fixed. Switched to fixed mode in a chart object, refreshed the view, confirmed that the request to the parameter archive included limit=1