fase(21): openapi documentation with scalar

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -36,10 +36,12 @@
     "typescript": "^5.0.0"
   },
   "dependencies": {
+    "@asteasolutions/zod-to-openapi": "^8.4.3",
     "@axe-core/playwright": "^4.11.1",
     "@casl/ability": "^6.8.0",
     "@octokit/rest": "^22.0.1",
     "@playwright/test": "^1.40.0",
+    "@scalar/express-api-reference": "^0.8.48",
     "@slack/web-api": "^7.14.1",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.6",