last_rowid returns `int ROWID` on non-`int` PKs

## Description

Non-int last_pk are called incorrectly, or the table continues to have a ROWID. This results in that `last_id` check on any DB change returns the hidden `int ROWID` rather than whatever the pk was set to.

- https://www.sqlite.org/c3ref/last_insert_rowid.html
- https://www.sqlite.org/withoutrowid.html

## Test

```sh
python tests/test_upsert.py::test_upsert_with_hash_id
```

Start by running tests/test_upsert.py::test_upsert_with_hash_id and read the linked SQLite documentation on last_insert_rowid and WITHOUT ROWID tables. Trace the last_rowid behavior for non-integer primary keys. Done means the last_id check returns the assigned primary-key value rather than the hidden integer ROWID.

Written by the indexing model from the issue text.