With manual transactions, race conditions on `last_insert_rowid()` need to be accounted for

## Race condition scenario with new configuration:

```python
# pseudocode

# We insert the record here!
db.insert(...)

# ! Record adding in different process increments the ROWID by another one

# Let's see the last PK, but now it's been incremented 0-to-many times
print(db.last_pk)
```

## Probably not a fix

```python
db.begin()
db.insert(...)
print(db.get_last_rowid()) # Not necessarily the record
db.commit()
```

首先跟踪 issue 中描述的 db.insert、db.last_pk 和 db.get_last_rowid 入口点，然后检查手动事务如何与并发进程交互。重现 pseudocode 中所示的交错执行，并在决定完整修复或测试应覆盖哪些内容之前，确定预期的主键行为。

由索引模型根据 Issue 内容生成。