Fix unscaled active mode link count via vehicle link counts

[syhwawa]

• Fix Scaling factor logic in vehicle link count #238

This PR addresses the issue in the scaling logic for link_vehicle_counts in Elara. Previously, the scaling logic only accounted for cars. Therefore, such as bike and walk were not properly scaled, resulting in inaccurate link counts when it was used for active mode.

The scaling logic has been updated to include all relevant modes ("car", "taxi", "bike", "walk") that require scaling when using this event handler.

The fix has been tested in the example simulation and the active mode account now should be scaled withthe config scale factor as expected.

bike count total sum before the fix: 95795.0
bike count total sum after the fix: 957950.0

The CI build pipeline is a bit out of date and it was updated to compatible version.

Proposed Testing Plan:
Write unit tests to validate the scaling logic for newly added mode