Canonical CI: grouped-tests.yml + root test/test_groups.toml

[ChrisRackauckas-Claude]

Summary

Converts the root test workflow (.github/workflows/Tests.yml) to the canonical SciML grouped-tests.yml@v1 thin caller, with the group × version matrix declared once in a root test/test_groups.toml. on: and concurrency: are preserved verbatim; the matrix test job is replaced by:

jobs:
  tests:
    uses: "SciML/.github/.github/workflows/grouped-tests.yml@v1"
    secrets: "inherit"

No with: overrides are needed: the package reads the default GROUP env var, has no ext/ (default src,ext coverage dirs are fine), needs no apt packages, and uses default check-bounds/coverage. Linux-only (no os axis). All other workflows are untouched.

Category B refactor (inline QA -> isolated QA group)

The repo previously ran ExplicitImports + JET + AllocCheck bundled in a lowercase nopre group. These are moved into a canonical GROUP=="QA" group:

• Functional tests run under GROUP=="Core" (and "All").
• The JET/ExplicitImports/AllocCheck checks are isolated in test/qa/Project.toml (its tooling deps + Test, with the package pulled in via [sources] path = "../..", julia = "1.10") plus a test/qa/qa.jl aggregator (explicit_imports.jl, jet_tests.jl, alloc_tests.jl moved from test/nopre/).
• runtests.jl dispatches on the canonical uppercase GROUP values; for QA it Pkg.activates test/qa, Pkg.develops the repo root, Pkg.instantiates, then includes qa.jl.
• .github/dependabot.yml updated for the test/nopre -> test/qa rename.

Matrix match (1:1, group renamed, per-group version coverage identical)

OLD inline matrix (version ∈ {1, lts, pre}, group ∈ {core, nopre}, exclude nopre+pre):

group	versions
core	lts, 1, pre
nopre	lts, 1

NEW (compute_affected_sublibraries.jl --root-matrix against the new test_groups.toml, verified locally):

group	versions
Core	lts, 1, pre
QA	lts, 1

Emitted set: (Core,lts) (Core,1) (Core,pre) (QA,lts) (QA,1) — 5 jobs, exactly matching the old 5 (core->Core, nopre->QA), all ubuntu-latest.

Benign metadata fixes (applied without running Aqua)

• Root [compat] julia already at the "1.10" LTS floor — left unchanged.
• Added [compat] entries for the [extras] deps missing them: Pkg = "1", Statistics = "1", Test = "1".

Verification (static only)

• test_groups.toml, root Project.toml, test/qa/Project.toml parse via Julia TOML.
• Tests.yml parses as YAML; thin-caller shape confirmed.
• Root matrix recomputed and matches the old matrix.
• Aqua/JET/tests were not run locally (structural conversion only).

QA group newly wired; Aqua/JET run in CI — any failures will be triaged in follow-up.

Ignore until reviewed by @ChrisRackauckas.

🤖 Generated with Claude Code