test: run minidb outside the default vitest project matrix (#311)

## Related Issue

No tracked issue — follow-on to the reconciliation stack (#307 / #308).

## Problem

The minidb cluster suite shares the root vitest shard matrix. Under CI
load, multi-process wait-read cases can time out even when they pass in
isolation, and they slow every shard.

## What changed

- Exclude `packages/minidb` from the root vitest `projects` glob
(`!packages/minidb`).
- Add a dedicated `test-minidb` CI job and require it in the aggregate
`test` gate so coverage stays required.

No product behavior change. No changeset (not user-facing).

## Checklist

- [x] I have read the
[CONTRIBUTING](https://github.com/PyModel/pythinker-code/blob/main/CONTRIBUTING.md)
document.
- [ ] I have linked a related issue (external PRs: the issue must have a
maintainer's `/approve`).
- [x] I have added tests that prove my feature works.
- [x] Ran `gen-changesets` skill, or this PR needs no changeset.
- [x] Ran `gen-docs` skill, or this PR needs no doc update.

Author: elkaix

.github/workflows/ci.yml

@@ -48,15 +48,33 @@ jobs:
       - run: pnpm install --frozen-lockfile
       - run: pnpm run test --shard=${{ matrix.shard }}/5
 
+  # minidb's cluster/stress suite is process-heavy and flakes under the
+  # shared shard matrix; run it in its own job outside the default projects.
+  test-minidb:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v6
+
+      - uses: actions/setup-node@v7
+        with:
+          node-version-file: .nvmrc
+          cache: pnpm
+
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm --filter @pymodel/minidb test
+
   test-complete:
     name: test
     if: always()
-    needs: test
+    needs: [test, test-minidb]
     runs-on: ubuntu-latest
 
     steps:
       - name: Verify all test shards passed
-        if: needs.test.result != 'success'
+        if: needs.test.result != 'success' || needs.test-minidb.result != 'success'
         run: exit 1
 
   # pi-tui's suite runs on node:test (not vitest), so the root `pnpm run test`

vitest.config.ts

@@ -4,7 +4,14 @@ import { vscodeProjects } from './apps/vscode/vitest.projects';
 
 export default defineConfig({
   test: {
-    projects: ['packages/*', 'apps/pythinker-code', 'apps/desktop', 'apps/pythinker-web', ...vscodeProjects],
+    projects: [
+      'packages/*',
+      '!packages/minidb',
+      'apps/pythinker-code',
+      'apps/desktop',
+      'apps/pythinker-web',
+      ...vscodeProjects,
+    ],
     coverage: {
       provider: 'v8',
       include: ['packages/*/src/**/*.ts', 'apps/*/src/**/*.ts'],