v9.12.2

ModelingToolkit v9.12.2

Diff since v9.12.1

Merged pull requests:

• Improve handling of expression in metadata (#2501) (@ven-k)
• Allow Array unknowns in OptimizationSystem (#2655) (@Vaibhavdixit02)
• We need to unwrap guesses (#2684) (@YingboMa)
• preserve argument order for structural parameters (#2689) (@baggepinnen)

Closed issues:

• Export getdefault function (#2484)
• Problem creating problems for vector variables/parameters (#2661)
• remake type promotion fails with empty initial conditions (#2664)
• structural_simplify doesn't properly namespace "bare" io variables (#2682)
• Bug with default value for @structural_parameters (#2688)