WIP: Sort material interaction in track fit

[mesmith75]

Not for merge or review yet. Just prodding.

[coderabbitai]

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[github-actions]

❌ prek hooks failed

trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...............................................................Passed
check toml...............................................................Passed
check for added large files..............................................Passed
check for merge conflicts................................................Passed
check for case conflicts.................................................Passed
mixed line ending........................................................Passed
clang-format.............................................................Failed
- hook id: clang-format
- files were modified by this hook
cpplint..................................................................Passed
codespell................................................................Failed
- hook id: codespell
- exit code: 65

  src/acts_geometry_provider.cpp:156: wallThickness ==> wall thickness
  src/acts_geometry_provider.cpp:162: wallThickness ==> wall thickness
gersemi..................................................................Passed
validate CITATION.cff....................................................Passed
reuse lint...............................................................Passed

hint: Some hooks made changes to the files.
If you are seeing this message in CI, reproduce locally with: `prek run --all-files`
To run prek as part of Git workflow, use `prek install` to set up Git shims.

All changes made by hooks:
diff --git a/src/acts_geometry_provider.cpp b/src/acts_geometry_provider.cpp
index aaf10d5..8140c12 100644
--- a/src/acts_geometry_provider.cpp
+++ b/src/acts_geometry_provider.cpp
@@ -165,8 +165,8 @@ Acts::MaterialSlab buildStationMaterialSlab(G4VPhysicalVolume* world_pv) {
 
     // Series combination for thin scatterers: 1/X0_eff = sum(t_i / X0_i).
     double const x0 = tTotal / (tMylar / mylar->GetRadlen() + tGas / gas->GetRadlen());
-    double const l0 = tTotal / (tMylar / mylar->GetNuclearInterLength() +
-                               tGas / gas->GetNuclearInterLength());
+    double const l0 =
+        tTotal / (tMylar / mylar->GetNuclearInterLength() + tGas / gas->GetNuclearInterLength());
 
     // See the function comment above — placeholders, inert while energyLoss
     // is off.
@@ -174,9 +174,9 @@ Acts::MaterialSlab buildStationMaterialSlab(G4VPhysicalVolume* world_pv) {
     constexpr float kPlaceholderZ = 7.f;
     constexpr float kPlaceholderMassRho = 1.f;
 
-    Acts::Material const material = Acts::Material::fromMassDensity(
-        static_cast<float>(x0), static_cast<float>(l0), kPlaceholderAr, kPlaceholderZ,
-        kPlaceholderMassRho);
+    Acts::Material const material =
+        Acts::Material::fromMassDensity(static_cast<float>(x0), static_cast<float>(l0),
+                                        kPlaceholderAr, kPlaceholderZ, kPlaceholderMassRho);
 
     return Acts::MaterialSlab(material, static_cast<float>(tTotal));
 }