Diagnostics for full solution do not work

[JiuHaoCunMin]

Issue Description

Modify dotnet.backgroundAnalysis.compilerDiagnosticsScope to "fullSolution", but only show openFiles

project state

"dotnet.server.useOmnisharp": false,

"dotnet.server.useOmnisharp": true,

Environment data

dotnet --info output:

dotnet info.txt

VS Code version: 1.100.3 C# Extension version: 2.80.16

C# logs

c# load project.log

c# open file.log

c# close file.log

C# LSP.log

Steps to reproduce

TestConsole.zip

Expected behavior

https://github.com/user-attachments/assets/06b63b1e-22da-49ef-b38b-ebe2936e6f96

Actual behavior

https://github.com/user-attachments/assets/4f143dfd-4e77-4c40-ac32-25c7826bc022