Feature Request: Expose bar pixel geometry in FastHistoBarRenderableSeries for overlay alignment

Hi SciChart team,

We are using FastHistoBarRenderableSeries to render per-candle volume profile histograms in a trading application.
The series works well for the bars themselves, but we need to draw a 1px outline rectangle around the full column of each bar group (from the lowest to the highest price level, spanning the full bid+ask width).

The problem is that FastHistoBarRenderableSeries does not expose its internal bar geometry — specifically the pixel coordinates of xCenter, halfCol (column half-width), yTop, and yBot for each rendered bar. Without these, any overlay CustomRenderableSeries we add to draw the border cannot reliably align with the bars, because it has to reverse-engineer the same width formula from DataPointWidth and MaxBarHeight, which does not produce a pixel-perfect match.

We would like to request one of the following (in order of preference):

1. A callback or event such as OnBarGeometryCalculated(int dataIndex, Rect barBoundsPixels) fired during InternalDraw, allowing external code to receive the exact pixel rect for each rendered bar group.

2. A public read-only property DataPointWidthPixels (or equivalent) that returns the computed column width in pixels for the current viewport, updated after each render pass.

3. Official documentation or a code example showing how to draw a pixel-accurate overlay on top of FastHistoBarRenderableSeries bars.

Our use case is a per-candle market profile / footprint chart where the column border is a key visual element for traders. Performance is critical — we are targeting 60fps with 200+ candles visible.

Thank you for considering this request. Happy to provide more details or a reproducible example if helpful.