v4.9.0

DiffEqCallbacks v4.9.0

Diff since v4.8.0

Merged pull requests:

• Remove outdated Julia v1.9 version check (#257) (@ChrisRackauckas)
• Add spell checking configuration (#259) (@ChrisRackauckas)
• Apply JuliaFormatter to fix code formatting (#260) (@ChrisRackauckas)
• Initialize line split fixes following Catalyst.jl PR #1306 (#262) (@ChrisRackauckas)
• Remove DataInterpolations v4.6 compatibility constraint (#265) (@ChrisRackauckas-Claude)
• Exploit that tstops are sorted (#266) (@devmotion)
• Test with ODEProblemLibrary v1.0 (#267) (@ChrisRackauckas)
• Allow DataStructures v0.19 (#268) (@ChrisRackauckas)
• Simplify tests (#270) (@ChrisRackauckas)
• Separate sensitivity analysis tests into NoPre test group (#271) (@ChrisRackauckas-Claude)