test(nextly): add drizzle-kit/api contract + SQLite cascade data-loss guards

[aqib-rx]

Summary

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would change existing behavior)
• Documentation update
• Refactor / chore (no user-facing change)

Related issues

Changeset

This repo uses Changesets. If your PR changes any publishable package under packages/*, you must include a changeset:

pnpm changeset

Then commit the generated .changeset/*.md file.

• I added a changeset (or this PR only touches non-publishable code: docs, tests, internal tooling, apps/*)
• I selected the correct semver bump (patch / minor / major)

The changeset-check CI job will fail if a publishable package is modified without a changeset.

Test plan

• pnpm lint
• pnpm check-types
• pnpm build
• Manually verified the change

Checklist

• I read CONTRIBUTING (if it exists)
• My commits follow the Conventional Commits spec (enforced by commitlint)
• I targeted the main branch
• I updated relevant documentation

Screenshots / recordings

Notes for reviewers