Audit cache key generation strategy

[chidozieononiwu]

As follow up to discussions around #2195
Audit the strategy used for creating cache keys, tools / service wide.

https://github.com/microsoft/mcp-pr/blob/docs/docs/azure-mcp/HttpCachingStrategy.md

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @alzimmermsft @anannya03 @anuchandy @g2vinay @microsoft/azure-mcp @xiangyan99.