Tracking issue for displaced tracks and electron reconstruction efficiency

After investigating the tracking issue, adjusting the parameters `MaxCellAngle` and `MaxCellAngleRZ `to 0.5 (as opposed to 0.1), in the `displaced step`, has significantly enhanced the reconstruction of displaced tracks (tested with displaced single particle). These [conditions](https://github.com/iLCSoft/ConformalTracking/blob/master/src/ConformalTracking.cc#L1686) were frequently not met, leading to track not being reconstructed.
The choice of the 0.5 value was somewhat arbitrary, and further optimisation is required.

However, despite this adjustment, an issue persists in properly reconstructing the Heavy Neutral Lepton (HNL) vertex with electron tracks. Interestingly, when considering all tracks in the event, the HNL vertex reconstruction aligns better with the expected distribution. What factors could be contributing to the reconstruction efficiency of electron?

1- Reconstructed vertex displacement (normalised to 1)

2- Comparison of Generated and reconstructed vertex displacement for `MaxCellAngle`, `MaxCellAngleRZ` = 0.5, left reconstructed with electrons tracks and right with all tracks in the event
 

3- Comparison of Generated and reconstructed vertex displacement `MaxCellAngle`, `MaxCellAngleRZ` = 0.1, left reconstructed with electrons tracks and right with all tracks in the event
 

Start at the displaced-step conditions in ConformalTracking.cc around line 1686, focusing on MaxCellAngle and MaxCellAngleRZ. Compare HNL vertex reconstruction with electron tracks and with all event tracks at values 0.1 and 0.5; done means identifying the cause of the electron inefficiency and determining a better parameter choice.

Written by the indexing model from the issue text.