Rea-time validation known issues

[928PJY]

Known issues:

• When the user opens one file, all diagnostics reported when building this file (some maybe not related to this file, like an issue in a toc that has no relation with this file). when the user closes the current file, all the diagnostics in the current file will be cleared, but others won't until the user explicitly open and close that file.
  The impact is limited for the following two reasons:
  • All the errors reported can be treated as related since it is a dependency when building this file, it can be improved by making the dependency build more accurate.
  • In most cases, the current repository should be perfect, all the new issues should be took care.

Ideas:

• Currently, we have debounce mechanism, but we maybe we can assign different debounce windows for different event.