QA: Aqua/JET findings marked @test_broken pending fix

The grouped-tests QA group (test/qa/qa.jl) surfaces the following genuine Aqua/JET findings. They are currently marked @test_broken so the QA group is green and the grouped-tests CI can merge; they should be fixed and then un-broken (removing the @test_broken lines and re-enabling the corresponding checks).

Aqua

• deps compat: ODEInterfaceDiffEq does not declare a [compat] entry for the LinearAlgebra stdlib dependency. Aqua's deps_compat check fails on it. Currently run as Aqua.test_all(ODEInterfaceDiffEq; deps_compat = false) plus a @test_broken false. Fix: add LinearAlgebra = "1" (or appropriate) to [compat], then re-enable deps_compat.

JET

• JET.test_package: 1 possible error — ODEInterfaceDiffEq.uBottomEltype is not defined (used in __solve at src/solve.jl:37). The JET.test_package call is replaced with a @test_broken false. Fix: define/import uBottomEltype (it appears to be expected from DiffEqBase/RecursiveArrayTools), then restore JET.test_package.

All other Aqua sub-checks (method ambiguity, unbound type parameters, undefined exports, project/extras comparison, stale deps, piracy, persistent tasks) PASS and remain enabled.

Ignore until reviewed by @ChrisRackauckas.

Start in test/qa/qa.jl by reviewing the broken Aqua and JET checks. Trace ODEInterfaceDiffEq.uBottomEltype from src/solve.jl:37 and inspect the package dependency compatibility configuration. Done means the LinearAlgebra compatibility entry is present, uBottomEltype is resolved, the @test_broken lines are removed, and the corresponding checks pass.