fix(db): stop pglite migration tests flaking CI (timeout + WASM OOM) (#647)

packages/db/vitest.config.ts

@@ -4,5 +4,22 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'node',
+    // The migration suite spins up a real PGlite (WASM Postgres) instance per
+    // test and applies the full drizzle migration set. Each case legitimately
+    // takes ~5s locally and considerably longer on CI, where turbo runs many
+    // packages' test suites concurrently. The 5s vitest default then expires
+    // mid-migration and the run fails as a phantom "Test timed out in 5000ms"
+    // (often surfacing the underlying WASM `memory access out of bounds` when
+    // the heap is starved). Give migrations real headroom.
+    testTimeout: 120_000,
+    hookTimeout: 120_000,
+    // Each PGlite instance carries a multi-hundred-MB WASM heap. Running test
+    // files in parallel forks multiplies that peak and is what tips the CI
+    // runner into the WASM OOM. A single fork keeps only one instance resident
+    // at a time — slightly slower, but deterministic.
+    pool: 'forks',
+    poolOptions: {
+      forks: { singleFork: true },
+    },
   },
 });