[dependabot]

Update Vitest and coverage to 4.1.12, Vite to 7.3.7 and source-map-js to 1.2.2 to address the development-dependency advisories. Keep Vite on its existing major version and retain both packages at 3.0.0 with the SDK's Node.js 18+ support.

Add CI for both packages on Node.js 18, 22 and 24, including installation, type checks, builds, ESM/CommonJS imports and package contents. Unit tests run on 22 and 24 because the existing Vitest major requires Node.js 20+. CI also checks development and production dependency audits for each package.

Validation:

• All three GitHub CI jobs pass on Node.js 18, 22 and 24. Both packages build and import successfully; unit tests run on 22 and 24.
• All 55 unit tests pass before and after the update.
• Type checking and builds pass for the SDK and the separate types package, including the existing types-only contract checks.
• All eight generated JavaScript/declaration files are byte-for-byte identical to the original master build.
• All four dependency audits report zero findings.
• Package imports, declarations and SDK client construction pass. Public source, both package versions, Node.js requirements, coverage settings and README files are unchanged.

The existing npm run test:coverage command fails its 90% thresholds before and after the update with identical results: 76.52% lines, 76.55% statements, 66.21% branches and 88.98% functions.

No SDK/types package release, consumer rebuild, bundle publication or production deployment is required for these tooling-only changes. Live API tests were not run.