feat: Add reference thermal conductivity

[dkachuma]

Adds a reference thermal conductivity. The point of this is that the user might want this to be read from the vtk file for example. So we separate this from the effective thermal conductivity which is the calculated output from the thermal conductivity model.

#3956

Rebaseline to fix errors of type

********************************************************************************
Error: /Problem/domain/MeshBodies/mesh1/meshLevels/Level0/ElementRegions/elementRegionsGroup/region/elementSubRegions/cb
	Group has a child 'thermalCond_linear_referenceThermalConductivity' in the file to compare but not the baseline file.
********************************************************************************

which is expected because this change introduces this new wrapper.

[codecov]

Codecov Report

❌ Patch coverage is 63.15789% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.89%. Comparing base (5abf149) to head (8513525).

Files with missing lines	Patch %	Lines
...malConductivity/SinglePhaseThermalConductivity.cpp	84.00%	4 Missing ⚠️
...ers/surfaceGeneration/EmbeddedSurfaceGenerator.cpp	0.00%	4 Missing ⚠️
...sicsSolvers/surfaceGeneration/SurfaceGenerator.cpp	0.00%	4 Missing ⚠️
...onductivity/SinglePhaseThermalConductivityBase.cpp	50.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3959      +/-   ##
===========================================
- Coverage    58.89%   58.89%   -0.01%     
===========================================
  Files         1353     1353              
  Lines       113035   113065      +30     
===========================================
+ Hits         66573    66589      +16     
- Misses       46462    46476      +14     

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[OmarDuran]

@dkachuma thank you for your contribution. The modifications in the SurfaceGenerators look good.

[dkachuma]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved and pushed in commit b9a4e48. I merged latest origin/develop, fixed the merge conflicts in .integrated_tests.yaml and BASELINE_NOTES.md, and finalized the merge commit.

[Copilot]

Pull request overview

This PR introduces a reference thermal conductivity field distinct from the computed effective thermal conductivity, enabling per-cell import (e.g., from VTK) without being overwritten by model initialization (Issue #3956).

Changes:

• Add referenceThermalConductivity as a writable/readable constitutive field and expose it through schema.
• Update SinglePhaseThermalConductivity to compute effectiveConductivity from the reference field (plus temperature gradient).
• Add an integrated test case that imports referenceThermalConductivity from a VTK mesh and rebaseline integrated tests accordingly.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
src/coreComponents/schema/schema.xsd.other	Adds schema attribute for referenceThermalConductivity.
src/coreComponents/constitutive/thermalConductivity/ThermalConductivityFields.hpp	Declares the new referenceThermalConductivity field trait.
src/coreComponents/constitutive/thermalConductivity/SinglePhaseThermalConductivityBase.hpp	Extends base update/state with reference conductivity and adds initializeState() hook.
src/coreComponents/constitutive/thermalConductivity/SinglePhaseThermalConductivityBase.cpp	Registers/allocates the new field.
src/coreComponents/constitutive/thermalConductivity/SinglePhaseThermalConductivity.hpp	Wires the reference field into the kernel wrapper + adds initialization overrides.
src/coreComponents/constitutive/thermalConductivity/SinglePhaseThermalConductivity.cpp	Implements initialization and uses reference conductivity in state setup and temperature updates.
src/coreComponents/physicsSolvers/surfaceGeneration/SurfaceGenerator.cpp	Initializes thermal conductivity state for newly created fracture elements.
src/coreComponents/physicsSolvers/surfaceGeneration/EmbeddedSurfaceGenerator.cpp	Initializes thermal conductivity state for newly created embedded-surface elements.
inputFiles/singlePhaseWell/thermal_compressible_single_phase_wells_1d.xml	New integrated test input importing reference conductivity from VTK.
inputFiles/singlePhaseWell/singlePhaseWell.ats	Registers the new integrated test deck.
inputFiles/singlePhaseWell/mesh_1d.vtr	Adds VTK mesh (Git LFS) containing conductivity field for import.
inputFiles/singlePhaseWell/.gitattributes	Ensures the VTK mesh is tracked via Git LFS.
.integrated_tests.yaml	Points CI integrated tests at the updated baseline bundle.
BASELINE_NOTES.md	Adds a baseline note entry for this baseline update.