Refactor global datasource part 3 (#16447)

## Context
Following https://github.com/twentyhq/twenty/pull/16399
Now using the new global orm manager everywhere and returning a
GlobalDatasource/WorkspaceDatasource based on a feature flag.
This means we now need to wrap all our ORM calls within
executeInWorkspaceContext callback (at least for now) so the global
datasource can dynamically hydrate its context via the new store (the
global datasource does not store anything related to workspaces as it is
now a unique singleton). If feature flag is off it still uses local data
stored in the workspace datasource.

packages/twenty-server/src/engine/metadata-modules/ai/ai-agent-execution/services/agent-actor-context.service.ts

@@ -9,7 +9,8 @@ import {
   AgentExceptionCode,
 } from 'src/engine/metadata-modules/ai/ai-agent/agent.exception';
 import { UserRoleService } from 'src/engine/metadata-modules/user-role/user-role.service';
-import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.manager';
+import { GlobalWorkspaceOrmManager } from 'src/engine/twenty-orm/global-workspace-datasource/global-workspace-orm.manager';
+import { buildSystemAuthContext } from 'src/engine/twenty-orm/utils/build-system-auth-context.util';
 
 export type AgentActorContext = {
   actorContext: ActorMetadata;
@@ -22,13 +23,15 @@ export class AgentActorContextService {
   constructor(
     private readonly userWorkspaceService: UserWorkspaceService,
     private readonly userRoleService: UserRoleService,
-    private readonly twentyORMGlobalManager: TwentyORMGlobalManager,
+    private readonly globalWorkspaceOrmManager: GlobalWorkspaceOrmManager,
   ) {}
 
   async buildUserAndAgentActorContext(
     userWorkspaceId: string,
     workspaceId: string,
   ): Promise<AgentActorContext> {
+    const authContext = buildSystemAuthContext(workspaceId);
+
     const userWorkspace =
       await this.userWorkspaceService.findById(userWorkspaceId);
 
@@ -39,18 +42,24 @@ export class AgentActorContextService {
       );
     }
 
-    const workspaceMemberRepository =
-      await this.twentyORMGlobalManager.getRepositoryForWorkspace(
-        workspaceId,
-        'workspaceMember',
-        { shouldBypassPermissionChecks: true },
-      );
+    const workspaceMember =
+      await this.globalWorkspaceOrmManager.executeInWorkspaceContext(
+        authContext,
+        async () => {
+          const workspaceMemberRepository =
+            await this.globalWorkspaceOrmManager.getRepository(
+              workspaceId,
+              'workspaceMember',
+              { shouldBypassPermissionChecks: true },
+            );
 
-    const workspaceMember = await workspaceMemberRepository.findOne({
-      where: {
-        userId: userWorkspace.userId,
-      },
-    });
+          return workspaceMemberRepository.findOne({
+            where: {
+              userId: userWorkspace.userId,
+            },
+          });
+        },
+      );
 
     if (!workspaceMember) {
       throw new AgentException(