Fix wrong getAll keyValue method (#8603)

Fixes
https://github.com/twentyhq/twenty/issues/8520#issuecomment-2485913500

- Fix the getAll key-value pairs method, as it returns incorrect
results. The keyVar values were being affected by keyValues from other
workspaces.
- Fix missing Sync Email step for existing users joining existing
workspace
  
Before, this method returned keyValues that verifies:
- workspaceId = user.defaultWorkspaceId
- userId = user.id

This method now returns:
- userId = null && workspaceId = user.defaultWorkspaceId
- userId = user.id && workspaceId = null
- userId = user.id && workspaceId = user.defaultWorkspaceId

## Result


https://github.com/user-attachments/assets/b7563db6-a6a8-4e09-a0c6-c372d7e2b712

packages/twenty-server/src/engine/core-modules/auth/services/sign-in-up.service.ts

@@ -209,12 +209,10 @@ export class SignInUpService {
         )
       : await this.userWorkspaceService.addUserToWorkspace(user, workspace);
 
-    if (isNewUser) {
-      await this.activateOnboardingForNewUser(user, workspace, {
-        firstName,
-        lastName,
-      });
-    }
+    await this.activateOnboardingForUser(user, workspace, {
+      firstName,
+      lastName,
+    });
 
     return Object.assign(user, updatedUser);
   }
@@ -266,7 +264,7 @@ export class SignInUpService {
     return workspace;
   }
 
-  private async activateOnboardingForNewUser(
+  private async activateOnboardingForUser(
     user: User,
     workspace: Workspace,
     { firstName, lastName }: { firstName: string; lastName: string },
@@ -331,20 +329,11 @@ export class SignInUpService {
 
     await this.userWorkspaceService.create(user.id, workspace.id);
 
-    await this.onboardingService.setOnboardingConnectAccountPending({
-      userId: user.id,
-      workspaceId: workspace.id,
-      value: true,
+    await this.activateOnboardingForUser(user, workspace, {
+      firstName,
+      lastName,
     });
 
-    if (firstName === '' && lastName === '') {
-      await this.onboardingService.setOnboardingCreateProfilePending({
-        userId: user.id,
-        workspaceId: workspace.id,
-        value: true,
-      });
-    }
-
     await this.onboardingService.setOnboardingInviteTeamPending({
       workspaceId: workspace.id,
       value: true,