Optimize metadata queries (#7013)

In this PR:

1. Refactor guards to avoid duplicated queries: WorkspaceAuthGuard and
UserAuthGuard only check for existence of workspace and user in the
request without querying the database

packages/twenty-server/src/engine/guards/jwt-auth.guard.ts

@@ -0,0 +1,35 @@
+import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
+
+import { TokenService } from 'src/engine/core-modules/auth/services/token.service';
+import { WorkspaceCacheStorageService } from 'src/engine/workspace-cache-storage/workspace-cache-storage.service';
+
+@Injectable()
+export class JwtAuthGuard implements CanActivate {
+  constructor(
+    private readonly tokenService: TokenService,
+    private readonly workspaceStorageCacheService: WorkspaceCacheStorageService,
+  ) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request = context.switchToHttp().getRequest();
+
+    try {
+      const data = await this.tokenService.validateToken(request);
+      const metadataVersion =
+        await this.workspaceStorageCacheService.getMetadataVersion(
+          data.workspace.id,
+        );
+
+      request.user = data.user;
+      request.apiKey = data.apiKey;
+      request.workspace = data.workspace;
+      request.workspaceId = data.workspace.id;
+      request.workspaceMetadataVersion = metadataVersion;
+      request.workspaceMemberId = data.workspaceMemberId;
+
+      return true;
+    } catch (error) {
+      return false;
+    }
+  }
+}