To make the code coverage analysis results more relevant, we intend to exclude any .h file from the analysis. To ensure that we don't miss any implementations, we should move them from .h files to .cpp files. When a header contains template code, we should modify the file extension from .h to .hpp.

The total number of relevant .h files in the GeoMechanicsApplication is about 120.

24-11-2025, Way of implementation:
Do pull request per directory.