test(webapp): cap vitest fork concurrency to bound testcontainer memory on CI

Author: d-cs

apps/webapp/vitest.config.ts

@@ -23,6 +23,10 @@ export default defineConfig({
     exclude: ["test/**/*.e2e.test.ts", "test/**/*.e2e.full.test.ts"],
     globals: true,
     pool: "forks",
+    // Each fork boots its own testcontainer set (including the two-DB run-ops fixtures),
+    // so cap concurrency to keep per-runner container memory in check. Sharding still
+    // provides cross-runner parallelism.
+    poolOptions: { forks: { maxForks: 4, minForks: 1 } },
     setupFiles: ["./test/setup.ts"], // load apps/webapp/.env
   },
   // @ts-ignore