[server/fga] improved api and code-gen

[svenefftinge]

Description

Enhancements to code generator and fga API

Summary generated by Copilot

🤖 Generated by Copilot at 43e6509

This pull request updates the server authorization module to use the new Authzed client library and its helper functions, and refactors some of the existing code to improve clarity and correctness. It affects the files authorizer.ts, definitions.ts, relationship-updater.ts, and relationship-updater.spec.db.ts.

Related Issue(s)

Fixes #

How to test

Documentation

Preview status

gitpod:summary

Build Options

Build

• /werft with-werft
  Run the build with werft instead of GHA
• leeway-no-cache
• /werft no-test
  Run Leeway with --dont-test

Publish

• /werft publish-to-npm
• /werft publish-to-jb-marketplace

Installer

• analytics=segment
• with-dedicated-emulation
• workspace-feature-flags
  Add desired feature flags to the end of the line above, space separated

Preview Environment

• /werft with-local-preview
  If enabled this will build install/preview
• /werft with-preview
• /werft with-large-vm
• /werft with-gce-vm
  If enabled this will create the environment on GCE infra
• with-integration-tests=all
  Valid options are all, workspace, webapp, ide, jetbrains, vscode, ssh
• with-monitoring

/hold

[geropl]

Taking a first look now 👀

[svenefftinge]

I have squashed it into #18369