🚸 Small corrections for statistics tracking

[burgholzer]

Description

Another small follow-up to #419 that squashed another couple of quirks in the statistics tracking.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[codecov]

Codecov Report

Merging #424 (b4e80f4) into main (6df3338) will decrease coverage by 0.1%.
Report is 1 commits behind head on main.
The diff coverage is 94.1%.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #424     +/-   ##
=======================================
- Coverage   89.5%   89.5%   -0.1%     
=======================================
  Files        102     102             
  Lines      11923   11925      +2     
  Branches    2098    2097      -1     
=======================================
- Hits       10680   10679      -1     
- Misses      1243    1246      +3     

Flag	Coverage Δ
cpp	89.5% <94.1%> (-0.1%)	⬇️
python	100.0% <ø> (ø)

Files Changed	Coverage Δ
src/dd/MemoryManager.cpp	83.0% <75.0%> (-1.7%)	⬇️
include/dd/UniqueTable.hpp	97.8% <100.0%> (ø)
src/dd/statistics/MemoryManagerStatistics.cpp	100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes

[github-actions]

Cpp-Linter Report ✔️

No problems need attention.

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