Fix tricky Rust error which turned out to just needing to use an actual py

```
error[E0277]: the trait bound `std::vec::Vec<T>: pyo3::FromPyObject<'_, '_>` is not satisfied
   --> rust/src/storage/db/python_db_pool.rs:228:30
    |
228 |         Ok(fetch_fn.call0()?.extract()?)
    |                              ^^^^^^^ the trait `pyo3::FromPyObject<'_, '_>` is not implemented for `std::vec::Vec<T>`
    |
note: required by a bound in `pyo3::types::PyAnyMethods::extract`
   --> /home/eric/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/pyo3-0.28.3/src/types/any.rs:881:12
    |
879 |     fn extract<'a, T>(&'a self) -> Result<T, T::Error>
    |        ------- required by a bound in this associated function
880 |     where
881 |         T: FromPyObject<'a, 'py>;
    |            ^^^^^^^^^^^^^^^^^^^^^ required by this bound in `PyAnyMethods::extract`
help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
    |
223 |     ) -> anyhow::Result<Vec<T>> where std::vec::Vec<T>: pyo3::FromPyObject<'_, '_> {
    |                                 ++++++++++++++++++++++++++++++++++++++++++++++++++
```

rust/src/storage/db/python_db_pool.rs

@@ -224,7 +224,7 @@ impl LoggingTransactionWrapper {
         let fetch_fn = self
             .logging_transaction_py
             .bind(py)
-            .getattr(intern!(self.logging_transaction_py.py(), "fetchall"))?;
+            .getattr(intern!(py, "fetchall"))?;
         Ok(fetch_fn.call0()?.extract()?)
     }
 }