Extremely slow to load solution in Aspire repo

[dibarbet]

Starting some dogfooding on aspire and noticed that the solution load is incredibly slow. While progress is seemingly being made, it has taken over 5 minutes and is not done.

I've noticed that the Roslyn server is getting spammed by two different requests (many many thousands of requests)

2025-04-08 10:19:01.645 [info] [Debug - 10:19:01 AM] [workspace/buildOnlyDiagnosticIds] [LanguageServerHost] Starting request handler
2025-04-08 10:19:01.645 [info] [Debug - 10:19:01 AM] [workspace/buildOnlyDiagnosticIds] [LanguageServerHost] Request handler completed successfully.

And

2025-04-08 10:11:42.162 [info] [Debug - 10:11:42 AM] [razor/dynamicFileInfoChanged] [LanguageServerHost] Starting request handler

~20k requests for each.

Additionally, there are many workspace/diagnostic requests as well, likely triggered by workspace refresh notifications.

Sometimes the project loads, but the request spam makes it so no other features work.

Prerelease version 2.73.16

[dibarbet]

With the fix for the build only diagnostics requests, I'm still seeing thousands of razor/dynamicFileInfoChanged requests, appearing to overload the Roslyn server. 10 minutes after opening dotnet/aspire I'm still seeing 10s of requests per second (up to about ~8k requests total). Normal C# language features respond incredibly slowly as they get blocked in the queue by these ones.

[dibarbet]

(Some additional details)

Appears to have started in this release - https://github.com/dotnet/vscode-csharp/releases/tag/v2.72.22

Before this release, Roslyn does get ~1k razor/dynamicFileInfoChanged requests, but then they stop soon after solution load completes and no changes are made.

After this release, I've gotten up to ~9k requests that never seem to stop even while no changes are being made.