Bump ModelingToolkitTearing SciMLBase compat to include v3

[ChrisRackauckas-Claude]

Summary

Widen lib/ModelingToolkitTearing/Project.toml's SciMLBase = "2.108" → "2.108, 3" so ModelingToolkitTearing resolves alongside SciMLBase v3 (shipping as part of the OrdinaryDiffEq v7 release line). Bumps ModelingToolkitTearing 1.12.3 → 1.13.0.

StateSelection (the root package) has no SciMLBase or DiffEqBase dependency and is unchanged.

Motivation

On SciML/OrdinaryDiffEq.jl#3488 (the v7 release branch) the test (ModelingToolkit, …) matrix fails at resolve time. Working up the stack, the final blocker (after the upstream compat bumps in SciML/DiffEqCallbacks.jl#303, SciML/DiffEqNoiseProcess.jl#271, SciML/DiffEqProblemLibrary.jl#182, SciML/JumpProcesses.jl#580, and SciML/ModelingToolkit.jl#4467 are applied) is:

Unsatisfiable requirements detected for package ModelingToolkitTearing [6bb917b9]:
 ModelingToolkitTearing [6bb917b9] log:
 ├─possible versions are: 1.0.0 - 1.12.3 or uninstalled
 └─restricted by compatibility requirements with SciMLBase [0bca4576] to versions: uninstalled — no versions left
   └─SciMLBase [0bca4576] log:
     ├─possible versions are: 1.0.0 - 3.3.0 or uninstalled
     └─restricted to versions 3 by StochasticDiffEqLowOrder [d15fe365]

lib/ModelingToolkitTearing/Project.toml had SciMLBase = "2.108", excluding v3. This PR widens that cap.

Why this is source-level safe

Grepped lib/ModelingToolkitTearing/src/ for every symbol removed in the SciMLBase v3 breaking notes (u_modified!, has_destats, sol.destats, concrete_solve, fastpow, RECOMPILE_BY_DEFAULT, DEStats, QuadratureProblem, tuples()/intervals(), standalone DEAlgorithm/DEProblem/DESolution, sol.x/sol.minimizer/sol.minimum). Zero matches.

The only SciMLBase API surface MTKTearing touches:

• SciMLBase.AbstractClock, SciMLBase.ContinuousClock(…), SciMLBase.PeriodicClock(dt) — clock-domain types in clock_inference/. Untouched by v3.
• SciMLBase.LinearProblem — untouched by v3.

None of these are on the v3 removal or rename list.

Verified end-to-end

On Julia 1.11, with this branch's lib/ModelingToolkitTearing dev'd alongside lib/DiffEqBase v7.0.0, lib/OrdinaryDiffEqCore v4.0.0, the DiffEqCallbacks / DiffEqNoiseProcess / ODEProblemLibrary / JumpProcesses / MTK / MTKBase compat-widened branch versions, and the full OrdinaryDiffEq monorepo sublib set:

• Resolver: clean.
• Precompile: clean (MTK 11.22.0, MTKBase 1.31.0, MTKTearing 1.13.0 all load on SciMLBase v3).
• Build + solve:

  using ModelingToolkit, OrdinaryDiffEqTsit5
  using ModelingToolkit: t_nounits as t, D_nounits as D
  @parameters k; @variables x(t)
  @mtkcompile sys = System([D(x) ~ -k*x], t)
  prob = ODEProblem(sys, [x => 1.0, k => 0.5], (0.0, 10.0))
  sol = solve(prob, Tsit5())
  # sol.u[end] == [0.0067385401…] vs analytical exp(-5) == 0.0067379469… (3e-7 agreement)

Test plan

• Source grep for every v3-removed symbol — clean.
• End-to-end resolve + precompile + @mtkcompile + solve with the full v7 stack dev'd in.
• CI on this PR (against the currently-registered SciMLBase 2.x line; source unchanged — expected green).
• OrdinaryDiffEq.jl#3488 test (ModelingToolkit, …) once this is registered and the upstream SciML-side bumps are registered.

Co-Authored-By: Chris Rackauckas accounts@chrisrackauckas.com