Extension activation reports unsupported macOS arm64 architecture

Does this occur consistently?
Repro steps:

1.
2.

Action: azextAgent.activate
Error type: Error
Error Message: Ce système d’exploitation et cette architecture ne sont pas pris en charge par l’extension GitHub Copilot pour Azure. Si vous pensez qu’il s’agit d’une erreur, veuillez contacter les auteurs de l’extension. osx-arm64

Version: 1.0.201
OS: darwin
OS Arch: arm64
OS Release: 25.3.0
Product: Visual Studio Code
Product Version: 1.118.1
Language: fr
UTC time: Fri, 08 May 2026 08:08:29 GMT

Call Stack

```
extension.bundle.js:2:2083618
fulfilled extension.bundle.js:2:2081191
```

Start at the azextAgent.activate entry point and use the extension.bundle.js call stack while reproducing activation in Visual Studio Code on macOS arm64. Trace why osx-arm64 is rejected; done means the extension activates successfully on the reported OS and architecture.

Written by the indexing model from the issue text.