cdo-table overrides function from another module at runtime

The command `cdo-table` overrides a function from another module.
https://github.com/MeteoSwiss/probtest/blob/1551787ab3b1eea0795da591cd0c7ef54e54e84e/engine/cdo_table.py#L129

This alters the behaviour of all other probtests-command relying on that method.

Start by reading engine/cdo_table.py at line 129 and tracing the function used by cdo-table and the other probtest commands. Reproduce the command interaction, then identify a focused regression test showing that cdo-table does not alter the behavior of other commands. Done means the commands remain independent and the regression test passes.

Written by the indexing model from the issue text.