v2.8.18-canary.15

<!-- Release notes generated using configuration in .github/release.yml at v2.8.18-canary.15 -->

What's Changed

Changelog

• fix: Prevent $TURBO_DEFAULT$ from matching unrelated root files in affected detection by @anthonyshew in https://github.com/vercel/turborepo/pull/12341
• feat: Route child process bytes through TaskHandle with sink-owned prefix rendering by @anthonyshew in https://github.com/vercel/turborepo/pull/12343
• feat: Deprecate graphviz-dependent --graph formats, add native SVG rendering by @anthonyshew in https://github.com/vercel/turborepo/pull/12344

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.18-canary.14...v2.8.18-canary.15