docs(equation-and-linear-solve): align completed contracts

phases/equation-and-linear-solve/step2.md

@@ -32,6 +32,8 @@ class PardisoLinearSolver final : public LinearSolver {
 public:
     PardisoLinearSolver();
     ~PardisoLinearSolver() override;
+    PardisoLinearSolver(const PardisoLinearSolver&) = delete;
+    PardisoLinearSolver& operator=(const PardisoLinearSolver&) = delete;
     [[nodiscard]] LinearSolveResult solve(
         const SymmetricCsr&,
         std::span<const double>) override;
@@ -42,6 +44,7 @@ public:
   테스트한다.
 - `mtype=2`, LP64 index, `iparm[34]=1`, matrix checker, analysis/factor/solve/release
   phase를 사용한다.
+- analysis/factor/solve/release의 모든 MKL 오류를 solver diagnostic으로 변환한다.
 
 ## Acceptance Criteria