Set SignalR WebSocketFactory for all environments

[BekAllaev]

Set SignalR WebSocketFactory for all environments

This pull request makes a minor adjustment to the handling of the WebSocketFactory property in the HttpConnectionFactory class. The change ensures that WebSocketFactory is always set in the shallow copy of HttpConnectionOptions, regardless of the operating system.

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Summary of the changes:
Always assign WebSocketFactory when creating a shallow copy of HttpConnectionOptions, not only on non-browser platforms. Previously it was only assigned inside the !OperatingSystem.IsBrowser() block.

Description

Fixes #63742

[dotnet-policy-service]

Thanks for your PR, @@BekAllaev. Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[Copilot]

Pull request overview

This PR updates the SignalR C# client’s HttpConnectionFactory shallow-copy logic so HttpConnectionOptions.WebSocketFactory is preserved for browser environments as well, instead of being dropped behind a !OperatingSystem.IsBrowser() guard.

Changes:

• Always assign WebSocketFactory when shallow-copying HttpConnectionOptions.
• Remove the browser-only omission of WebSocketFactory from the non-browser conditional block.

[Copilot]

The new behavior (copying WebSocketFactory even when OperatingSystem.IsBrowser() is true) isn’t covered by existing tests. Current unit tests for ShallowCopyHttpConnectionOptions only run on non-browser runtimes and don’t validate the browser-specific path, so a regression here could go unnoticed. Consider adding a test that runs under a browser/WASM target (or another automated browser-runtime test) to assert that WebSocketFactory flows through the shallow copy on browser platforms.