Coexists with Mocha (kept for unit-style tests) and Cypress (unchanged,
web e2e). Adds:
- apps/api/features/*.feature — Gherkin scenarios
- apps/api/features/step-definitions/*.steps.ts — step implementations
- apps/api/features/support/world.ts — per-scenario World, spins up the
Express app in-process via createApp() + supertest (no real server
needed, same approach as the existing Mocha health test)
- apps/api/cucumber.cjs — config, deliberately .cjs (not .js) to avoid
the same ESM/CJS config-loading mismatch that broke
apps/web/cypress.config.ts earlier
- `test:bdd` script (cross-env + tsx via NODE_OPTIONS=--import=tsx, for
cross-platform ESM+TS loading)
- health.feature/steps as a working example, mirroring the existing
Mocha health test so both suites cover the same behavior in their
respective styles
CI: runs `pnpm --filter api test:bdd` alongside the existing test step.
README: documents the new test layer and the TS/ESM config-loading
caveat for future tool configs.
Verified locally: lint, mocha, cucumber, and full build all pass.
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