Track GUIDs for better maintainability and scalability

[KarishmaGhiya]

Based on this PR discussion, https://github.com/microsoft/mcp/pull/1164/files#r2520549355

• There should be a better approach to track and assign GUIDs for future maintenance and scalability
• Initial suggestion in the discussion thread involved a central file for tracking all GUID constants, but there were concerns raised regarding its compatibility with Code gen and that a central file doesn't respect the repository structure and dependence
• If the current hardcoding of GUIDs in code is scalable and trackable for future, feel free to close the issue
• Else design a better approach to track GUIDs keeping Code gen and project structure concerns in mind

[joshfree]

@KarishmaGhiya do you have a suggestion for what you'd like to see changed?