fix(dev): bind-mount vendor/ on host, align mago schema to 1.47.3

[tyrsson]

What

The \�endor\ named volume in \compose.yml\ kept dependencies inside the Docker Desktop VM instead of the developer's working tree, and forced all Composer I/O through the slow VM layer (observable as pegged CPU during installs).

Changes

• \compose.yml: \�endor/:/app/vendor\ named volume removed — \�endor/\ is now the host's own copy via the existing :./app\ bind mount. The container is only the test runner. Composer cache stays in a named volume.
• \mago.toml: schema comment aligned from 1.47.2 to the central webware-tools 1.47.3 pin (Dockerfile already at 1.47.3).

Verification

• \docker compose config --quiet\ — valid
• \docker compose up -d\ — tooling, mysql (healthy), phpMyAdmin on 8080
• \composer install\ — packages land in host \�endor/; container and host see identical trees
• \mago 1.47.3 lint\ — clean (baseline filters 28 issues)
• \composer test\ — OK (86 tests, 130 assertions)

Companion change to the webware-tools alignment preset (source of truth); sibling PRs for the other packages with the same setup will follow.

Co-authored-by: Copilot 223556219+Copilot@users.noreply.github.com

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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