fix(test): use ** glob to include nested lambda src/ trees in coverage

packages/lambda/*/src/ is two levels below packages/, so the single-star
glob packages/*/src/** missed all five lambda packages. Switching to
packages/**/src/** matches src/ at any depth while still excluding e2e/,
playwright.config.ts, vite.config.ts, and other non-source files.

https://claude.ai/code/session_013coUXcACPpVfmbK9i2D86Z

Author: claude

app/vitest.config.ts

@@ -34,7 +34,8 @@ export default defineConfig({
       // Measure all source files, not just those touched by tests.
       // Scoped to src/ trees so Playwright e2e files, Vite/Playwright configs,
       // and other non-unit-tested support files are excluded by default.
-      include: ['packages/*/src/**/*.{ts,tsx}'],
+      // Double-star is needed because lambda packages nest under packages/lambda/*.
+      include: ['packages/**/src/**/*.{ts,tsx}'],
       exclude: [
         'packages/**/*.test.{ts,tsx}',
         'packages/**/*.d.ts',