## Context
When signing up on a new workspace,
`SignInUpService.signUpOnNewWorkspace`
manually drove a transaction with `createQueryRunner` /
`startTransaction` /
`commitTransaction` / `rollbackTransaction` / `release`.
If the underlying Postgres connection dropped mid-transaction
(`idle_in_transaction_session_timeout`, server-side termination), the
`pg`
client's `'error'` event fires. TypeORM's connect-time listener responds
by
calling `release()` on the `QueryRunner`, which sets `isReleased = true`
but
deliberately does **not** touch `isTransactionActive`.
The `catch` branch then hit:
```ts
if (queryRunner.isTransactionActive) {
await queryRunner.rollbackTransaction(); // throws QueryRunnerAlreadyReleasedError
}
throw error;
```
Error from Sentry
```typescript
QueryRunnerAlreadyReleasedError: Query runner already released. Cannot run queries anymore.
at PostgresQueryRunner.query (.../PostgresQueryRunner.js:177)
at PostgresQueryRunner.rollbackTransaction (.../PostgresQueryRunner.js:167)
at SignInUpService.signUpOnNewWorkspace (.../sign-in-up.service.js:370)
```
## Changes
Replaced the hand-rolled transaction with
this.dataSource.transaction(...).
TypeORM's built-in wrapper already does what we need:
- starts/commits/rolls back the transaction
- wraps rollback in try { ... } catch { /* ignore */ }, so a connection
drop no longer masks the real error
- releases the QueryRunner unconditionally
## Note
Other fix would have been to do this
```typescript
if (queryRunner.isTransactionActive && **!queryRunner.isReleased**) {
try {
await queryRunner.rollbackTransaction();
} catch {
```
