feat(server): support multiple hosts in one deployment (#12950)

close CLOUD-233



#### PR Dependency Tree


* **PR #12950** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added support for configuring multiple server hosts across backend and
frontend settings.
* Enhanced deployment and Helm chart configuration to allow specifying
multiple ingress hosts.
* Updated admin and configuration interfaces to display and manage
multiple server hosts.

* **Improvements**
* Improved URL generation, OAuth, and worker service logic to
dynamically handle requests from multiple hosts.
  * Enhanced captcha verification to support multiple allowed hostnames.
* Updated frontend logic for platform-specific server base URLs and
allowed origins, including Apple app domains.
  * Expanded test coverage for multi-host scenarios.

* **Bug Fixes**
* Corrected backend logic to consistently use dynamic base URLs and
origins based on request host context.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/env.ts

@@ -12,6 +12,8 @@ declare global {
     var readEnv: <T>(key: string, defaultValue: T, availableValues?: T[]) => T;
     // oxlint-disable-next-line no-var
     var CUSTOM_CONFIG_PATH: string;
+    // oxlint-disable-next-line no-var
+    var CLS_REQUEST_HOST: 'CLS_REQUEST_HOST';
   }
 }
 
@@ -53,6 +55,7 @@ export type AppEnv = {
   version: string;
 };
 
+globalThis.CLS_REQUEST_HOST = 'CLS_REQUEST_HOST';
 globalThis.CUSTOM_CONFIG_PATH = join(homedir(), '.affine/config');
 globalThis.readEnv = function readEnv<T>(
   env: string,