fix: unblock Render deploy when Prisma migrations fail

Add missing milestones migration and fall back to db push so backend updates deploy successfully.

render.yaml

@@ -3,7 +3,7 @@ services:
     name: eene-dashboard-backend
     runtime: node
     rootDir: backend
-    buildCommand: npm install --include=dev && npx prisma migrate deploy && npx prisma generate && npm run build
+    buildCommand: npm install --include=dev && npx prisma migrate deploy || npx prisma db push && npx prisma generate && npm run build
     startCommand: npm start
     envVars:
       - key: DATABASE_URL