During compilation VFX particles are missing cyan placeholder shader when using Shader Graph output

Steps to reproduce:

1. Open the attached project
2. Open the Sample scene
3. Reimport or Modify the 'New Shader Graph' asset to trigger shader compilation
4. Observe the VFX object in the Scene

Actual results: While Shader Graph asset is compiling the VFX object is not rendered

Expected results: While Shader Graph asset is compiling a cyan place holder shader is used for VFX particles as a visual indicator for shader compilation

Reproducible with versions: 2022.3.61f1, 6000.0.48f1, 6000.1.2f1, 6000.2.0a10

Tested on (OS):  macOS 15.4.1, Ubuntu 24.04

Notes:

• The Sample Scene contains a Cube object which uses a material created from the same shader. During shader compilation, the Cube receives a place holder shader as expected