# Description

This MR changes the `AssetBase` and `SensorBase` classes to use
time-line events instead of physics events for initializing and
invalidating physics-based handles. This is needed for cases where we
have to wait for physics mesh cooking to finish before the handles are
available.

For instance, with the previous code, when trying to initialize the
views for deformable objects, the following error happens:

```bash
2023-11-11 00:18:06 [17,966ms] [Error] [omni.physx.plugin] Cuda context manager error, simulation will be stopped and new cuda context manager will be created.
2023-11-11 00:18:06 [17,966ms] [Error] [omni.physx.plugin] PhysX error: SynchronizeStreams cuStreamWaitEvent failed with error 700
, FILE /buildAgent/work/74336105e89c4a74/source/gpucommon/include/PxgCudaUtils.h, LINE 59
2023-11-11 00:18:06 [17,966ms] [Error] [omni.physx.plugin] Cuda context manager error, simulation will be stopped and new cuda context manager will be created.
2023-11-11 00:18:06 [17,967ms] [Error] [omni.physx.plugin] PhysX error: memcpy failed fail!
  700, FILE /buildAgent/work/74336105e89c4a74/source/gpunarrowphase/src/PxgNarrowphaseCore.cpp, LINE 1444
2023-11-11 00:18:06 [17,967ms] [Error] [omni.physx.plugin] Cuda context manager error, simulation will be stopped and new cuda context manager will be created.
2023-11-11 00:18:06 [17,967ms] [Error] [omni.physx.plugin] PhysX error: GPU clampMaxValues fail to launch kernel!!
, FILE /buildAgent/work/74336105e89c4a74/source/gpusimulationcontroller/src/PxgSoftBodyCore.cpp, LINE 484
2023-11-11 00:18:06 [17,967ms] [Error] [omni.physx.plugin] Cuda context manager error, simulation will be stopped and new cuda context manager will be created.
2023-11-11 00:18:06 [17,968ms] [Error] [omni.physx.plugin] PhysX error: GPU sortSoftBodyContacts fail to launch kernel!!
```

## Type of change

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./orbit.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there