[Automated] PRs inserted in VS build main-12007.199

[View Complete Diff of Changes](https://github.com/dotnet/roslyn/compare/e52fdaedde14ebc717268fce8e2f3b2686dd5b7b...ed7c2f0b8555529c2abd079945dbc918f0e009df?w=1)
- [validate-sdk: use preview package feed when restoring the test app](https://github.com/dotnet/roslyn/pull/84410)
- [[LSP] Add progress when loading solution and progress](https://github.com/dotnet/roslyn/pull/84399)
- [update main to be non-draft](https://github.com/dotnet/roslyn/pull/84405)
- [Use the shared KnownMonikers.Sparkle for the On-The-Fly Docs Copilot icon](https://github.com/dotnet/roslyn/pull/84401)
- [Fix formatting of hot reload unexpected errors](https://github.com/dotnet/roslyn/pull/84391)
- [[EE] Enable `using static` for non-static classes in CSharp EE](https://github.com/dotnet/roslyn/pull/84042)
- [Update code review skill to push model to not repeat same feedback if previously resolved](https://github.com/dotnet/roslyn/pull/84348)
- [Remove dead DotNet-VSTS-Infra-Access variable group reference](https://github.com/dotnet/roslyn/pull/84382)
- [Revert "Update VSSDK to 18.9.496-Preview"](https://github.com/dotnet/roslyn/pull/84363)
- [Unsafe evolution: avoid errors inside nameof](https://github.com/dotnet/roslyn/pull/84325)
- [Clarify code review guidance for revert PRs](https://github.com/dotnet/roslyn/pull/84366)
- [Respect object initializer severity for fade diagnostics](https://github.com/dotnet/roslyn/pull/84324)
- [Restructure agent knowledge base for context-efficient loading](https://github.com/dotnet/roslyn/pull/84308)
- [Handle instrumented conditions in post-lowering passes](https://github.com/dotnet/roslyn/pull/84244)
- [Dispose builders in declaration computer](https://github.com/dotnet/roslyn/pull/84339)
- [Collect Razor formatting logs during VS feedback recording](https://github.com/dotnet/roslyn/pull/84303)
- [Offer fully-qualify code fix for unresolved types in cref attributes](https://github.com/dotnet/roslyn/pull/84346)
- [Guard Razor semantic token spans](https://github.com/dotnet/roslyn/pull/84334)
- [Don't assume a Razor buffer is non-null, until we know it's ours](https://github.com/dotnet/roslyn/pull/84337)
- [doc(IncrementalGenerators): the square example is wrong, that's only a multiplication by a factor 2](https://github.com/dotnet/roslyn/pull/84340)
- [Update VSSDK to 18.9.496-Preview](https://github.com/dotnet/roslyn/pull/84262)
- [Remove unused ID field from `SyntaxAnnotation`.](https://github.com/dotnet/roslyn/pull/84295)
- [Bump main to 18.10 (5.10.0) after 18.9 snap](https://github.com/dotnet/roslyn/pull/84329)

Start with the linked complete diff and the individual PRs listed in the issue; this is an automated aggregation for VS build main-12007.199 rather than a scoped code task. No file, test, or independent completion condition is named, so a newcomer should not begin implementation until a specific change is identified.

Written by the indexing model from the issue text.