Tests refactor

packages/api/vitest.config.ts

@@ -4,14 +4,13 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'node',
-    include: ['src/**/*.test.ts'],
+    include: ['tests/**/*.test.ts'],
     coverage: {
       provider: 'v8',
       enabled: false, // enable via --coverage flag or test:cov script
       all: true,
       include: ['src/**/*.ts'],
       exclude: [
-        'src/**/*.test.ts',
         'src/scripts/**',
         'src/common/types.ts', // declaration merging only — no runtime logic
       ],