fix(poly): phi boundary values now coorespond to theta flux through polytrope surface

src/poly/solver/public/polySolver.h

@@ -111,6 +111,8 @@ private: // Private methods
      * trying to account for the true size of the system. VSize on the other hand refers to the total number of dofs.
      *
      * @return blockOffsets The offsets for the blocks in the operator
+     *
+     * @pre m_feTheta and m_fePhi must be valid, populated FiniteElementSpaces.
      */
     mfem::Array<int> computeBlockOffsets() const;