Set MATLABDiffEq version to 1.7.0

[ChrisRackauckas-Claude]

Ignore this PR until it has been reviewed by @ChrisRackauckas.

What changed and why

Correct the package version declarations to the first sequential patch or minor release after General's latest non-yanked versions. The default branch contains source changes, but this PR is limited to release metadata and internal compat needed by the sequential versions.

Package	General	Branch before	Proposed	Bump
MATLABDiffEq	1.6.3	1.6.3	1.7.0	minor

Verification

• GROUP=QA /home/crackauc/.juliaup/bin/julia +release --project=. -e 'using Pkg; Pkg.test()' — passed. Test Summary: | Pass Total Time / QA/qa.jl | 20 20 1m48.3s / Testing MATLABDiffEq tests passed
• /home/crackauc/.juliaup/bin/julia +release --project=. -e 'using Pkg; Pkg.test()' — passed. Test Summary: | Pass Total Time / Core/jet_tests.jl | 34 34 0.2s / Test Summary: | Total Time / Core/matlab_runtime_tests.jl | 0 6.2s / Testing MATLABDiffEq tests passed
• /home/crackauc/.juliaup/bin/julia +release --startup-file=no -m Runic --check . — passed.
• typos --force-exclude Project.toml — passed.
• git diff --check — passed.

The docs build was not run because this diff changes no docstrings, documentation, or public API. GPU and downstream jobs were not run locally.

Registration

After this PR is merged, register each package separately from a commit on the default branch:

• MATLABDiffEq: @JuliaRegistrator register

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