Add some more tests, tweak the guess value and add another escape hatch

[Ickaser]

No description provided.

[Copilot]

Pull request overview

This PR strengthens the design_space.dry() edge-case handling and test coverage by adding scenarios that previously risked unstable iteration behavior and by introducing an “escape hatch” when computed product temperatures exceed the melting point.

Changes:

• Added new design-space edge-case tests for high temperature/high pressure, “hot-dry” (melt-risk), and negative equipment capability behavior.
• Improved numerical stability by reusing the previous Tsub as the next fsolve initial guess.
• Added a warning + early-continue path that marks sublimation flux outputs as NaN when the computed maximum product temperature exceeds 0°C.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
tests/test_design_space.py	Adds edge-case regression tests around infeasible sublimation, melt-risk conditions, and negative equipment capability handling.
lyopronto/design_space.py	Improves solver convergence behavior and adds a melt-risk “escape hatch” that warns and returns NaN flux metrics.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.