Refactor workspace cache service (#16208)

## Context
We've recently introduced a new workspace cache service which now acts
as a cache access and local storage for all workspace related data,
deprecating the individual specific services.
- Better performance through multiple caching/fetching strategies
- Consistent data access patterns across the codebase
- Reduced redis queries through MGET/MSET/PIPELINE with multiple cache
keys

packages/twenty-server/src/engine/workspace-cache/interfaces/workspace-cache-provider.service.ts

@@ -0,0 +1,15 @@
+import { Injectable } from '@nestjs/common';
+
+import {
+  type WorkspaceCacheDataMap,
+  type WorkspaceCacheKeyName,
+} from 'src/engine/workspace-cache/types/workspace-cache-key.type';
+
+type WorkspaceCacheDataType = WorkspaceCacheDataMap[WorkspaceCacheKeyName];
+
+@Injectable()
+export abstract class WorkspaceCacheProvider<
+  T extends WorkspaceCacheDataType = WorkspaceCacheDataType,
+> {
+  abstract computeForCache(workspaceId: string): Promise<T>;
+}