feat(server): improve ci build (#15386)

#### PR Dependency Tree


* **PR #15386** 👈

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

* **Bug Fixes**
  * Improved email rendering and formatting consistency.
* Preserved calendar synchronization windows while removing reliance on
date utility libraries.
* Enhanced cleanup of Prisma engine files, including deduplication and
space-saving reporting.

* **Tests**
  * Updated email snapshots to validate formatted HTML output.

* **Refactor**
* Streamlined email component usage and centralized email rendering
behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/mails/index.tsx

@@ -1,7 +1,7 @@
-import { render as rawRender } from '@react-email/components';
-import { type ComponentType, createElement, type ReactElement } from 'react';
+import { type ComponentType, createElement } from 'react';
 
 import { Comment, CommentMention, Mention } from './docs';
+import { render } from './render';
 import {
   TeamBecomeAdmin,
   TeamBecomeCollaborator,
@@ -41,10 +41,6 @@ type EmailContent = {
   html: string;
 };
 
-function render(component: ReactElement) {
-  return rawRender(component, { pretty: env.testing });
-}
-
 type Props<T> = T extends ComponentType<infer P> ? P : never;
 export type EmailRenderer<Props> = (props: Props) => Promise<EmailContent>;