chore: synchronize pending app/backend updates and repository hygiene

Includes current frontend and backend work in progress and removes generated artifacts from tracking to keep the repository clean for дальнейшая разработка.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "dev": "tsx watch src/index.ts",
     "build": "tsc",
+    "test:alert-engine": "tsx src/services/alert-engine/groups.test.ts && tsx src/services/alert-engine/evaluate-rule.test.ts && tsx src/services/alert-engine/confirm-stability.test.ts",
     "start": "node dist/index.js",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "drizzle-kit migrate",