dask-scheduler command not found with newer versions of distributed

Hi!

**Describe the issue**:

Somewhere between distributed 2025.9.0 and 2026.7.1, the package stopped providing the script `dask-scheduler`.
I use uv installer in the example, but the same issue is with pip.
The result for me is that dask-kubernetes doesn't start properly

**Minimal Complete Verifiable Example**:

```
$ docker run --rm -it ghcr.io/astral-sh/uv:debian sh
# uv venv old-dask
Using CPython 3.13.5 interpreter at: /usr/bin/python3
Creating virtual environment at: old-dask
# . old-dask/bin/activate
(old-dask) # uv pip install dask distributed==2025.9.0
Using Python 3.13.5 environment at: /old-dask
Resolved 19 packages in 457ms
Prepared 19 packages in 250ms
Installed 19 packages in 6ms
+ click==8.4.2
+ cloudpickle==3.1.2
+ dask==2025.9.0
+ distributed==2025.9.0
+ fsspec==2026.6.0
+ jinja2==3.1.6
+ locket==1.0.0
+ markupsafe==3.0.3
+ msgpack==1.2.1
+ packaging==26.2
+ partd==1.4.2
+ psutil==7.2.2
+ pyyaml==6.0.3
+ sortedcontainers==2.4.0
+ tblib==3.2.2
+ toolz==1.1.0
+ tornado==6.5.7
+ urllib3==2.7.0
+ zict==3.0.0
(old-dask) # which dask-scheduler
/old-dask/bin/dask-scheduler
(old-dask) # deactivate
# uv venv new-dask
Using CPython 3.13.5 interpreter at: /usr/bin/python3
Creating virtual environment at: new-dask
# . new-dask/bin/activate
(new-dask) # uv pip install dask distributed==2026.7.1
Using Python 3.13.5 environment at: /new-dask
Resolved 18 packages in 75ms
Prepared 2 packages in 184ms
Installed 18 packages in 8ms
+ click==8.4.2
+ cloudpickle==3.1.2
+ dask==2026.7.1
+ distributed==2026.7.1
+ fsspec==2026.6.0
+ jinja2==3.1.6
+ locket==1.0.0
+ markupsafe==3.0.3
+ msgpack==1.2.1
+ packaging==26.2
+ partd==1.4.2
+ psutil==7.2.2
+ pyyaml==6.0.3
+ sortedcontainers==2.4.0
+ tblib==3.2.2
+ toolz==1.1.0
+ tornado==6.5.7
+ zict==3.0.0
(new-dask) # which dask-scheduler
(new-dask) # dask-scheduler
sh: 11: dask-scheduler: not found
```

**Anything else we need to know?**:

**Environment**:

- Dask version: 2026.7.1
- Python version: 3.12
- Operating System: linux/mac
- Install method (conda, pip, source): uv, pip

Reproduce the missing dask-scheduler command with distributed 2025.9.0 and 2026.7.1 using the installation commands in the issue. Compare the package entry points between those versions, then verify that dask-scheduler is installed and that dask-kubernetes starts correctly with the fixed version.

Written by the indexing model from the issue text.