Fix TransactionNotStartedError (#19155)

## Context
Checked in the codebase where we are trying to rollback a non-active
transaction.


packages/twenty-server/src/engine/core-modules/auth/services/sign-in-up.service.ts
seemed to be the only place where it happens.

We could enforce this with a lint rule in the future 🤔

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

@@ -9,7 +9,6 @@ import { Repository, type DataSource, type QueryRunner } from 'typeorm';
 import { v4 } from 'uuid';
 
 import { USER_SIGNUP_EVENT_NAME } from 'src/engine/api/graphql/workspace-query-runner/constants/user-signup-event-name.constants';
-import { MAX_WORKSPACES_WITHOUT_ENTERPRISE_KEY } from 'src/engine/core-modules/auth/constants/max-workspaces-without-enterprise-key.constants';
 import { type AppTokenEntity } from 'src/engine/core-modules/app-token/app-token.entity';
 import { ApplicationService } from 'src/engine/core-modules/application/application.service';
 import {
@@ -21,6 +20,7 @@ import {
   compareHash,
   hashPassword,
 } from 'src/engine/core-modules/auth/auth.util';
+import { MAX_WORKSPACES_WITHOUT_ENTERPRISE_KEY } from 'src/engine/core-modules/auth/constants/max-workspaces-without-enterprise-key.constants';
 import {
   type AuthProviderWithPasswordType,
   type ExistingUserOrPartialUserWithPicture,
@@ -593,16 +593,18 @@ export class SignInUpService {
       );
 
       await queryRunner.commitTransaction();
-      await this.workspaceCacheService.invalidateAndRecompute(workspaceId, [
-        'flatApplicationMaps',
-      ]);
 
       return { user, workspace };
     } catch (error) {
-      await queryRunner.rollbackTransaction();
+      if (queryRunner.isTransactionActive) {
+        await queryRunner.rollbackTransaction();
+      }
       throw error;
     } finally {
       await queryRunner.release();
+      await this.workspaceCacheService.invalidateAndRecompute(workspaceId, [
+        'flatApplicationMaps',
+      ]);
     }
   }