[.NET] Improve the review quality and efficiency SDK Release PR

As SDK generation and release workflows increasingly rely on AI and self-service, the review process has become a key bottleneck.
While SDK generation is becoming faster and more scalable, human review remains time-consuming and inconsistent, impacting release velocity and quality.

Create this sub issue to track the work for ,NET

The issue identifies SDK generation and release workflows and the SDK Release PR review process, but names no files, tests, or entry points. Start by locating the .NET SDK release workflow and its review tooling; the issue needs a defined scope and acceptance criteria before completion can be determined.

Written by the indexing model from the issue text.