Doxygen correctness

[97gamjak]

close #586

[pq-perf-bot]

⚡ Performance (instruction count) — ✅ no regressions

per-benchmark breakdown

benchmark	base Ir	PR Ir	Δ
bondedForces	38.25M	38.25M	-0.00%	✅
boxTransforms	10.67M	10.67M	+0.00%	✅
constraints	11.06M	11.06M	+0.00%	✅
coulombKernel	5.80M	5.80M	+0.00%	✅
forceKernel	9.98M	9.98M	-0.00%	✅
integrator	31.65M	31.65M	-0.00%	✅
interWater	1689.12M	1689.12M	-0.00%	✅
kinetics	8.55M	8.55M	+0.00%	✅
linearAlgebra	2.08M	2.08M	+0.00%	✅
nonCoulombPairs	5.48M	5.48M	+0.00%	✅
shiftVector	5.81M	5.81M	+0.00%	✅
virial	10.03M	10.03M	-0.00%	✅

_{Deterministic callgrind instruction counts vs the base branch; gated at ±2%. Not wall-clock.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.22%. Comparing base (c559660) to head (069a2ea).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #587      +/-   ##
==========================================
- Coverage   91.25%   91.22%   -0.04%     
==========================================
  Files         324      324              
  Lines       14766    14774       +8     
  Branches     4980     4996      +16     
==========================================
+ Hits        13475    13477       +2     
- Misses       1201     1207       +6     
  Partials       90       90              

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Approval dismissed: new commits contain changes beyond a merge-up from dev.