feat: Enhance Finding Exclusion Module: Implement blocked ID validati…

[iralgarc]

…on and make unique ID field readonly when default ID is set

Description

Enhance Finding Exclusion Module

Fix

How does someone fix the issue in code and/or in runtime?

Checklist:

• The pull request is complete according to the guide of contributing of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes