Type completeness

[DerManoMann]

Summary

Improve testing of annotation nesting.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Enhancement (improvement to existing functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactor (no functional changes)
• Chore (maintenance, dependencies, CI)

Related Issues

Fixes #1988

Test Plan

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code where necessary
• I have updated the documentation accordingly
• My changes generate no new warnings
• New and existing tests pass locally
• Any dependent changes have been merged and published

[github-actions]

Created backport PR for 5.x:

• [Backport #1989 to 5.x] Type completeness #1995 with remaining conflicts!

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-1989-to-5.x
git worktree add --checkout .worktree/backport-1989-to-5.x backport-1989-to-5.x
cd .worktree/backport-1989-to-5.x
git reset --hard HEAD^
git cherry-pick -x aaf4e43093e5dd213b7bdbce550d90549a636997
git push --force-with-lease