Timer Event is not recognized in the differ module

Describe the Bug

When we compare two models, and there is a difference in the "duration" configuration in the timer event, then bpmn-js-differ neither populate in the "list of changes" section nor show it on the difference on the models.

Steps to Reproduce

1. create two BPMNs (clone each other) with timer event with default event duration as PT1S
2. take the second BPMN file and change the above same event's duration to PT15S
3. upload these two BPMN Files in the https://demo.bpmn.io/diff, to see if the tool can alert the timer difference.
4. diff tool doesn't alert a difference at the timer event.

Expected Behavior

1. Diff tool is expected to show the different between two models
2. Tool may have to high light there is a difference in timer event node.
3. Tool may have to list this difference in "List of changes" panel.

Environment

• Host (Browser/Node version: Version 105.0.5195.125 (Official Build) (64-bit)
• OS: [e.g. Windows 7]: Windows 11
• Library version: [e.g. 2.0.0]

Sample BPMN Files.zip