`isinstance` detects module as a type

**Describe the bug**
No warning is displayed about the misuse of `isinstance` when an argument is not a type,

**Code or Screenshots**
```python
import datetime
import typing

a = typing.cast(datetime.datetime | None, None)

isinstance(a, datetime) # error: datetime is not a type
```

```
>>> py -m pyright test.py
0 errors, 0 warnings, 0 informations
```

**VS Code extension or command-line**
I'm using Pylance in strict mode and this issue arose. When I tested it on the command line, it persisted.

Pylance: 2025.6.1
Pyright (pip): 1.1.402

Start by running the minimal Python example from the issue with Pyright 1.1.402 and inspect how the analyzer handles the second argument to isinstance. Trace the relevant type-checking path and add coverage for a module used where a type is expected; done means Pyright reports the misuse without introducing unrelated diagnostics.

Written by the indexing model from the issue text.