test: configure automated server tests (CM-968)

[skwowet]

Summary

Adds the first server-side test foundation for CDP.

This sets up root-level Vitest, a GitHub Actions workflow for server tests, and @crowd/test-kit as the shared package for composable test building blocks. The first fixture is withQx, which gives tests an isolated Postgres database cloned from a migrated test_template and reset before each test.

Local and CI database preparation both build the same test_template shape, but use environment-specific entry points: local prep is handled by ./scripts/cli scaffold up-test against the Docker Compose test database, while CI uses .github/scripts/prepare-test-template-db.sh against the GitHub Actions Postgres service.

As part of this, QueryExecutor moved into @crowd/database, with temporary re-exports from @crowd/data-access-layer to keep the migration low-risk. The backend also drops unused legacy native packages (erlpack, zlib-sync) that were breaking installs on newer macOS toolchains.

[Copilot]

Pull request overview

This PR introduces an initial server-side test foundation for CDP by adding a root Vitest setup, a shared @crowd/test-kit package with a Postgres-backed fixture, and CI automation to run server tests. It also relocates QueryExecutor into @crowd/database (with compatibility re-exports) and removes problematic native dependencies from the backend.

Changes:

• Add root-level Vitest configuration and root pnpm scripts for running server tests.
• Introduce @crowd/test-kit with a Postgres worker DB clone/reset baseline (withQx) and shared DB template preparation scripts.
• Move QueryExecutor into @crowd/database with transitional re-exports from @crowd/data-access-layer, and drop erlpack/zlib-sync from backend deps.

Reviewed changes

Copilot reviewed 20 out of 22 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
vitest.config.ts	Adds root Vitest configuration and a dedicated “server” project.
package.json	Adds root test scripts and devDependencies for Vitest/Vite.
.github/workflows/server-tests.yml	Adds CI workflow to prepare Postgres template DB and run server tests.
.env.test	Adds local test env defaults for DB connection.
services/libs/test-kit/package.json	Introduces @crowd/test-kit package and its dependencies.
services/libs/test-kit/tsconfig.json	Adds TS config for the new test-kit library.
services/libs/test-kit/src/types.ts	Defines shared types for test Postgres connection info.
services/libs/test-kit/src/postgres.ts	Implements worker DB cloning, reset, and baseline seeding utilities.
services/libs/test-kit/src/fixtures.ts	Adds withQx fixture to provide a reset, seeded QueryExecutor per test.
services/libs/database/src/queryExecutor.ts	Moves/defines QueryExecutor + pg-promise implementation in database lib.
services/libs/database/src/index.ts	Re-exports queryExecutor from @crowd/database.
services/libs/database/src/connection.ts	Removes formatQuery from connection module (now in queryExecutor).
services/libs/data-access-layer/src/queryExecutor.ts	Re-exports pg-promise QueryExecutor from @crowd/database and keeps Sequelize-backed executor.
services/libs/data-access-layer/src/auditLogs/index.ts	Updates QueryExecutor construction to use pgpQx.
services/libs/data-access-layer/vitest.config.ts	Removes per-package Vitest config (now using root config).
services/libs/data-access-layer/package.json	Removes vitest scripts/dependency from this package.
services/apps/data_sink_worker/src/bin/fix-member-attributes.ts	Updates QueryExecutor construction to use pgpQx.
scripts/scaffold.test.yaml	Adds local test Postgres compose scaffold.
scripts/prepare-test-template-db.sh	Adds shared script to build and migrate the test_template DB.
scripts/cli	Adds down-test scaffold command and reuses shared template-prep script.
backend/package.json	Removes native deps (erlpack, zlib-sync) from backend.
pnpm-lock.yaml	Updates lockfile for Vitest/Vite additions and dependency removals.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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[Copilot]

Pull request overview

Copilot reviewed 20 out of 22 changed files in this pull request and generated 3 comments.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

[Copilot]

Pull request overview

Copilot reviewed 20 out of 22 changed files in this pull request and generated 1 comment.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

[ulemons]

I like how the withQx fixture interface is composed.
Moving QueryExecutor into @crowd/database makes sense: test-kit only pulls in what it needs without dragging all of data-access-layer along.

couple of things things worth considering:

• hookTimeout: 300_000 is very generous; consider lowering to 60–90s so CI fails fast if the clone hangs
• The Sequin volume in scaffold.test.yaml deserves an inline comment — it's not obvious why the test DB needs it
• The Flyway image is rebuilt on every CI run; some layer caching would help

None of these are blockers. Great Job