Ingested data is invisible from later database transactions

[hwjsnc]

Describe the bug
When ingesting data and closing/reopening the database, the ingested data is not visible from within a read transaction under some conditions, as if the ingestion had never happened.

To Reproduce

Ensure that test-db does not exist and run the code below. When rerunning the code a few times on the same db, eventually all asserts succeed.

use fjall::Readable as _;
use fjall::{Database, KeyspaceCreateOptions, PersistMode, SingleWriterTxDatabase, Slice};

let path = "./test-db";
let ks = "my keyspace";
let key: Slice = b"my key".into();
let value: Slice = b"some value".into();

{
    let db = Database::builder(path).open().unwrap();
    let keyspace = db.keyspace(ks, KeyspaceCreateOptions::default).unwrap();
    let mut ing = keyspace.start_ingestion().unwrap();
    ing.write(key.clone(), value.clone()).unwrap();
    ing.finish().unwrap();
    db.persist(PersistMode::SyncAll).unwrap();
    assert_eq!(keyspace.get(key.clone()).unwrap(), Some(value.clone())); // ok
}

{
    let db = Database::builder(path).open().unwrap();
    let keyspace = db.keyspace(ks, KeyspaceCreateOptions::default).unwrap();
    assert_eq!(keyspace.get(key.clone()).unwrap(), Some(value.clone())); // not in a transaction - ok
}

{
    let db = SingleWriterTxDatabase::builder(path).open().unwrap();
    let tx = db.read_tx();
    let keyspace = db.keyspace(ks, KeyspaceCreateOptions::default).unwrap();
    assert_eq!(tx.get(&keyspace, key.clone()).unwrap(), Some(value.clone())); // assert fails, read returns None
}

Expected behavior
Ingested data should be visible in later transactions.

Additional context

• Tested on fjall version 3.1.0, Rust version 1.93.0, Linux