read_csv from filehandle, when turned into a view, stops working with `No files found that match the pattern "DUCKDB_INTERNAL_OBJECTSTORE://...`

### What happens?

`cursor.read_csv(filehandle)` returns a DuckDBPyRelation object on which you can call `.to_view(viewname)` but the view isn't usable later, once the returned DuckDBPyRelation object has gone out of scope. If you try to do something like `cursor.read_csv(filehandle).to_view('viewname')` then it doesn't work at all.

This doesn't seem to be a problem for opening a csv by filename, or for relations made into tables, just for csvs opened from filehandles and made into views. I think I can understand why it's happening, but it is

(In case you're wondering, I'm opening files from filehandles as a workaround for https://github.com/duckdb/duckdb/discussions/12232 ... so more typically `with bzip2.open(filename) as fh: cursor.read_csv(fh).to_view(viewname)` or similar but using a StringIO makes for a simpler demo to reproduce.)

### To Reproduce

```
import duckdb
from io import StringIO

cursor = duckdb.connect()

csv_file = StringIO("foo,bar\nhello,world")
rel = cursor.read_csv(csv_file)
rel.to_view("view1")
print(rel.alias)
print(cursor.sql("select * from view1"))

csv_file = StringIO("foo,bar\nhello,world")
cursor.read_csv(csv_file).to_view("view2")
print(cursor.sql("select * from view2"))
```

The first way works, the second way doesn't:

```
$ python x.py
DUCKDB_INTERNAL_OBJECTSTORE://b38cc260dcc16094
┌─────────┬─────────┐
│ foo │ bar │
│ varchar │ varchar │
├─────────┼─────────┤
│ hello │ world │
└─────────┴─────────┘

Traceback (most recent call last):
File "/home/nick/Work/wehi/countess/x.py", line 14, in
print(cursor.sql("select * from view2"))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
duckdb.duckdb.IOException: IO Error: No files found that match the pattern "DUCKDB_INTERNAL_OBJECTSTORE://ce4251be44deb137"
```

It also fails with the same error if `rel` is deleted or goes out of scope before the SQL query of the view. Note also that `read_csv(filename).to_view(viewname)` works fine.

### OS:

Linux 6.8.0 x86_64

### DuckDB Package Version:

1.5.3 from pypi

Also source build duckdb-python 1.6.0-dev45 @ ab63b5f2d2713d8f57486209e3c78e0ba246c6c6
w/ duckdb v1.5.2-4685-g01eda16d6e

### Python Version:

3.12.3

### Full Name:

Nick Moore

### Affiliation:

Mnemote Pty Ltd

### What is the latest build you tested with? If possible, we recommend testing with the latest nightly build.

I have tested with a stable release 1.5.3 also 1.3.1
I have tested with 1.6.0.dev45 @ ab63b5f2d2713d8f57486209e3c78e0ba246c6c6

### Did you include all relevant data sets for reproducing the issue?

Yes

### Did you include all code required to reproduce the issue?

- [x] Yes, I have

### Did you include all relevant configuration to reproduce the issue?

- [x] Yes, I have

Bắt đầu với đường dẫn Python API được thực thi bởi cursor.read_csv(StringIO) và DuckDBPyRelation.to_view(), sử dụng phần tái hiện trong issue. Kiểm tra hành vi khi relation là tạm thời hoặc nằm ngoài phạm vi, sau đó xác minh rằng một view được tạo từ filehandle vẫn có thể được truy vấn về sau, bao gồm cả trường hợp gọi trực tiếp theo chuỗi.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.