fix(swagger): convert coverage test to ES modules

- Convert swagger-coverage.test.js to use ES module imports
- Use dynamic import for yamljs (CommonJS library)
- Fix Vitest compatibility issue

tests/integration/swagger-coverage.test.js

@@ -9,22 +9,32 @@
  * - Required security schemes are referenced
  */
 
-const { describe, it, expect } = require('vitest');
-const request = require('supertest');
-const { createApp } = require('../../server/app');
-const YAML = require('yamljs');
-const fs = require('fs');
-const path = require('path');
+import { describe, it, expect, beforeAll } from 'vitest';
+import request from 'supertest';
+import { createApp } from '../../server/app.js';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+// Load YAML using dynamic import for yamljs which is CommonJS
+async function loadYAML() {
+  const YAML = await import('yamljs');
+  return YAML;
+}
 
 describe('Swagger Coverage', () => {
   let app;
   let openapiSpec;
   let swaggerSpec;
 
-  beforeAll(() => {
+  beforeAll(async () => {
     // Load the base OpenAPI spec from YAML
     const yamlPath = path.join(__dirname, '../../server/openapi.yaml');
     const yamlContent = fs.readFileSync(yamlPath, 'utf8');
+    const YAML = await loadYAML();
     openapiSpec = YAML.parse(yamlContent);
 
     // Create app and get the merged swagger spec