ModelingToolkitBase-v1.49.0

ModelingToolkitBase ModelingToolkitBase-v1.49.0

Diff since ModelingToolkitBase-v1.45.1

Merged pull requests:

• refactor: ensure init system is in terms of unknowns of DAE (#4631) (@AayushSabharwal)
• feat: add reversible transformation API (#4655) (@AayushSabharwal)
• feat: [AI] add isolate_subsystem (#4658) (@AayushSabharwal)
• refactor: update MTK to reversible transformations API (#4659) (@AayushSabharwal)
• build: restore accidentally removed sources entries (#4664) (@AayushSabharwal)
• build: bump MTKBase minor version (#4665) (@AayushSabharwal)
• Add analyze_initialization_jacobian — diagnose rank-deficient initialization (#4666) (@baggepinnen)
• build: bump MTK patch version (#4667) (@AayushSabharwal)
• refactor: store mm in TearingState (#4668) (@AayushSabharwal)
• Declare public API (unlock downstream ExplicitImports allow-lists) (#4669) (@ChrisRackauckas-Claude)
• As/bump version (#4673) (@AayushSabharwal)
• refactor: eliminate unnecessary maxiters warnings if missing_guess_value is not Error (#4674) (@AayushSabharwal)
• Release 1 subpackage(s) (#4676) (@ChrisRackauckas)
• Raise downgrade floors in ModelingToolkitBase (FunctionWrappers/ImplicitDiscreteSolve/OffsetArrays/BipartiteGraphs) (#4677) (@ChrisRackauckas-Claude)
• fix: fix bugs, improve type-stability (#4678) (@AayushSabharwal)
• Trajectory linearization: avoid per-timepoint recompilation; require op for loop-opening parameters (#4679) (@baggepinnen)
• Init test: accept NonlinearLeastSquaresProblem fallback for HydraulicSystem (#4681) (@singhharsh1708)
• fix: handle non-mtkcompile systems in full_equations initialization (#4682) (@AayushSabharwal)
• build_explicit_observed_function: remove unused dervals (#4683) (@KristofferC)
• reorder_parameters: avoid double lookup for identical key (haskey + getindex) and use get instead (#4684) (@KristofferC)
• build: bump MTKBase minor, MTK minor versions (#4686) (@AayushSabharwal)

Closed issues:

• Initialization test: HydraulicSystem returns NonlinearLeastSquaresProblem instead of SCCNonlinearProblem{LinearProblem} (#4680)