Code review completed - In-process diagnosers implementation approved

[Copilot]

Reviewed the in-process diagnosers feature implementation per request. No code changes needed.

Review Summary

The implementation successfully introduces IInProcessDiagnoser for running diagnosers in the benchmark process with:

• Clean separation: IInProcessDiagnoser interface for host-side logic, IInProcessDiagnoserHandler for in-process execution
• Type-safe routing: Handler type + serialized config pattern instead of C# source code generation (addresses previous design feedback)
• Comprehensive test coverage: InProcessDiagnoserTests validates multiple diagnosers with all RunMode combinations across Default, InProcessEmit, and InProcessNoEmit toolchains
• DisassemblyDiagnoser refactored as first in-process diagnoser with backward-compatible RunInHost option

The router pattern in CompositeInProcessDiagnoserHandler correctly sequences handlers by RunMode and routes results back via index-based deserialization. Source generation in CodeGenerator.GetInProcessDiagnoserRouters() properly initializes handlers with serialized config.

Implementation is production-ready.

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