Usage of transactions in `:memory:` database was broken with #105
## What was reported
Issue tursodatabase/libsql-client-ts#229 (closed, 11 comments): #105 regressed in memory databases when transactions are used. Once a transaction is created, the entire in memory database will be effectively discarded for subsequent db operations that the client makes.
From the regressing PR.
> 1. A single connection is created lazily whenever user executes a statement
> 2. When a transaction starts, the Transaction object takes ownership of the current transaction.
> 3. Subsequent queries will create a new connection.
In particular, this [line of code](https://github.com/tursodatabase/libsql-client-ts/blob/4258668bd9659e8faaf2aba9098c20ce549bd112
## The verified resolution
Honest status: STILL BROKEN on main / @libsql/client 0.17.2 per a maintainer (BartWaardenburg, CONTRIBUTOR), who re-confirmed with a 17-line repro. Root cause: PR #105 made transactions take ownership of a lazily-created connection, so on `:memory:` DBs the in-memory database is effectively discarded for subsequent operations after a transaction. Workaround: use `file::memory:?cache=shared` as the URL (shared cache mode keeps one DB; introduced ~0.8/0.9 via PR #220). Caveat: closing connections behaves oddly in shared-cache mode.Maintainer review
No maintainer verification is recorded for this version.
This records the version a maintainer checked. It does not assert that the version is the latest upstream release.
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