Revert "C++: Revert doc-related changes to dbscheme"
Revert "C++: Revert doc-related changes to dbscheme"

This reverts commit e81d197ebdf2c1f17108b48ed04d54c0809835a4.

github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql