Review NestJS 11 changes

[davidmytton]

NestJS 11 has been released with some breaking changes. We should review the migration guide to make sure we're compatible.

Dependency updates on the docs e.g. arcjet/arcjet-docs#377 are failing to build due to the version specification:

npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: @arcjet/[email protected]
npm error Found: @nestjs/[email protected]
npm error node_modules/@nestjs/common
npm error   @nestjs/common@"11.0.3" from the root project
npm error   peer @nestjs/common@"^10.0.0 || ^11.0.0" from @nestjs/[email protected]
npm error   node_modules/@nestjs/config
npm error     @nestjs/config@"4.0.0" from the root project
npm error   2 more (@nestjs/core, @nestjs/platform-express)
npm error
npm error Could not resolve dependency:
npm error peer @nestjs/common@"^10" from @arcjet/[email protected]
npm error node_modules/@arcjet/nest
npm error   @arcjet/nest@"1.0.0-beta.1" from the root project
npm error
npm error Conflicting peer dependency: @nestjs/[email protected]
npm error node_modules/@nestjs/common
npm error   peer @nestjs/common@"^10" from @arcjet/[email protected]
npm error   node_modules/@arcjet/nest
npm error     @arcjet/nest@"1.0.0-beta.1" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.