Missing events in touchCallback for pan and zoom

Nobody has claimed this yet.

**Describe the bug**
As soon as a LineChart has a set transformationConfig property no FlPan* events are being reported anymore to touchCallback in lineTouchData.

**To Reproduce**
Modify LineChartSample12 so that lineTouchData includes a touchCallback:
```
lineTouchData: LineTouchData(
touchCallback:
(FlTouchEvent event, LineTouchResponse? touchResponse) {
debugPrint(event.runtimeType.toString());
},
...
```
Try to zoom and pan. This callback will not report FlPanStartEvent and subsequent events.

Is this intentional?

I need these events to figure out when the user has reached the starting point of the diagram to lazy load more data.

**Versions**
Flutter: 3.32.1
fl_chart: 1.0.0

Start with LineChartSample12 and its LineTouchData touchCallback reproduction. Trace how transformationConfig handles pan and zoom events, then compare the reported events with the expected FlPanStartEvent and subsequent events. Done means the callback reports the relevant pan events while zooming and panning, with behavior covered by an appropriate test if the project provides one.

Written by the indexing model from the issue text.