lf-repository-api-client-dotnet

This skill should be used when the user wants to "regenerate the dotnet V2 client", "regen lf-repository-api-client-dotnet", "update the C# swagger client", "refresh the V2 client library", "pull new V2 methods into the dotnet client", "publish a preview NuGet", or otherwise rebuild `src/Clients/RepositoryClients.cs` from a server swagger. Use it eagerly whenever a server-side V2 endpoint has just been added or modified in `site-api-repository`. Covers the NSwag regen mechanics, the mandatory `patch_optional_multipart.py` post-processing step, the branch-protection rules on `v1`/`v2`, and the two ways to consume the new surface (UseLocalClientLib for fast iteration, preview NuGet for shipping).