Thermal poromechanics with stabilizationType="Global" does not propagate temperature (pressure-only stabilized flux)

[behzaadh]

Describe the bug
In thermal single-phase poromechanics, when stabilizationType="Global" is enabled in SinglePhasePoromechanics, pressure propagates but temperature does not propagate correctly.
The stabilized flux path uses a pressure-only kernel (NUM_EQN = 1, NUM_DOF = 1) and does not assemble thermal/energy flux terms.

Relevant code locations:

• src/coreComponents/physicsSolvers/fluidFlow/SinglePhaseFVM.cpp
  • SinglePhaseFVM< SinglePhaseBase >::assembleStabilizedFluxTerms(...)
  • Contains comment: // No thermal support yet
• src/coreComponents/physicsSolvers/fluidFlow/kernels/singlePhase/StabilizedFluxComputeKernel.hpp
  • NUM_EQN = 1, NUM_DOF = 1

Expected behavior
With isThermal="1", both pressure and temperature should propagate consistently in the coupled poromechanics case, including when stabilization is enabled.

Platform (please complete the following information):

• Machine [e.g. LLNL/Quartz]
  • Local Linux workstation
• GEOS Version [e.g. 0.2]
  • develop branch, commit bd9ff57015

Additional context

• The same thermal box forcing setup works in the no-stress flow-only case.
• Coupled run logs show thermal equation residual (Renergy) is present, but stabilized flux assembly path appears pressure-only.
• This suggests missing thermal support in stabilized single-phase flux assembly rather than an input field-spec issue.