Fix DataDrivenLux Downgrade lane: raise IntervalArithmetic (0.22.10) and Optim (2) floors

[ChrisRackauckas-Claude]

Fix DataDrivenLux Downgrade Sublibraries lane (raise IntervalArithmetic and Optim floors)

The Downgrade Sublibraries / test (lib/DataDrivenLux) lane is red on master (run 28267588245, commit eb11901). The main Downgrade lane is green; only the DataDrivenLux sublibrary fails, and only at minimum compat versions. It resolves and builds, then fails at runtime with 5 errors. Two distinct root causes, both gated by [compat] lower bounds in lib/DataDrivenLux/Project.toml:

1. IntervalArithmetic floor 0.22 → 0.22.10 (4 errors)

src/utils.jl generates safe_sin/safe_cos/etc. as f(x) = real(<f>(Complex(x))). During path-interval propagation, x is an Interval{Float64}, so this calls sin(::Complex{Interval}). Base's sin(::Complex) evaluates zr == 0, which dispatches to ==(::Interval, ::Interval). IntervalArithmetic 0.22.0–0.22.9 throw ArgumentError("== is purposely not supported for intervals"). 0.22.10 added the thin-interval fallback so the comparison returns a value and sin(Complex{Interval}) works. Raise the floor to 0.22.10.

2. Optim floor 1.7, 2 → 2 (1 BoundsError)

BoundsError: attempt to access Float64 at index [2] in LineSearches.var"#ϕdϕ#2". LineSearches ≤ 7.5.x make_ϕdϕ does f, g = value_gradient!(df, x_new) and fails to unpack the scalar return of ManifoldObjective.value_gradient!. LineSearches 7.6.0 switched to value_jvp!(df, x_new, s) (a 2-tuple) and requires NLSolversBase 8. No Optim 1.x admits NLSolversBase 8 (all cap 7.9.0), so at the Optim 1.7 floor LineSearches stays ≤ 7.5.x and the BoundsError persists. Optim 2.0.0 pulls LineSearches 7.6+ / NLSolversBase 8. Drop the 1.7 floor; require Optim = "2".

Also bumps DataDrivenLux 0.2.4 → 0.2.5.

Verification (Julia 1.10 LTS, floors pinned to their minimums)

Resolved with IntervalArithmetic pinned to v0.22.10 and Optim pinned to v2.0.0. The resolver co-installs IntervalArithmetic 0.22.10, Optim 2.0.0, LineSearches 7.7.1, NLSolversBase 8.0.0, then ran the DataDrivenLux Core test group:

=== KEY VERSIONS (pinned to floor) ===
LineSearches        7.7.1
IntervalArithmetic  0.22.10
Lux                 1.31.2
Optim               2.0.0
NLSolversBase       8.0.0
Distributions       0.25.129

Test Summary: | Pass  Total     Time
DataDrivenLux |   96     96  8m35.1s

96/96 pass, 0 fail, 0 error (was 0 pass / 5 errored on the old floors).

This PR only touches lib/DataDrivenLux/Project.toml. Please ignore until reviewed by @ChrisRackauckas.