dotnet-linq-optimization LINQ performance patterns for .NET applications. Covers the critical distinction between server-side evaluation and client-side materialization, compiled queries for EF Core hot paths, deferred execution pitfalls, LINQ-to-Objects allocation patterns and when to drop to manual loops, and Span-based alternatives for zero-allocation processing. Out of scope: EF Core DbContext lifecycle, migrations, interceptors, and connection resiliency -- see [skill:dotnet-efcore-patterns]. Strategic data architecture (repository patterns, read/write split, N+1 governance) -- see [skil…