Following astral-sh#17448, this change ensures keyring authentication is
configured on the client builder early in tool commands, so all
subsequent registry operations benefit from it.

Previously, the client builder was used without keyring settings in
various places (resolve_names, RequirementsSpecification::from_sources,
CachedEnvironment::from_spec), which could fail for private indexes
requiring keyring-based authentication.

Now, keyring is configured once on the client builder right after
initializing shared state, and this configured builder is reused
throughout the function. This follows the same pattern used in
pip/compile.rs and avoids the class of bug where forgetting to
configure keyring for a specific operation causes auth failures.

This MR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [astral-sh/uv](https://github.com/astral-sh/uv) | patch | `0.9.24` → `0.9.26` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

---

### Release Notes

<details>
<summary>astral-sh/uv (astral-sh/uv)</summary>

### [`v0.9.26`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#0926)

[Compare Source](astral-sh/uv@0.9.25...0.9.26)

Released on 2026-01-15.

##### Python

- Add CPython 3.15.0a5

##### Enhancements

- Add a hint to update uv when a managed Python download is not found ([#&#8203;17461](astral-sh/uv#17461))
- Improve cache initialization failure error message ([#&#8203;17469](astral-sh/uv#17469))
- Improve error message for abi3 wheels on free-threaded Python ([#&#8203;17442](astral-sh/uv#17442))
- Add support for `--no-sources-package` ([#&#8203;14910](astral-sh/uv#14910))

##### Preview features

- Add `METADATA.json` and `WHEEL.json` in uv build backend ([#&#8203;15510](astral-sh/uv#15510))
- Add support for GCS request signing ([#&#8203;17474](astral-sh/uv#17474))
- Adjust the process ulimit to the maximum allowed on startup ([#&#8203;17464](astral-sh/uv#17464))

##### Bug fixes

- Lock to avoid concurrent refresh of pyx tokens ([#&#8203;17479](astral-sh/uv#17479))

##### Documentation

- Add linting and formatting instructions to the CONTRIBUTING guide ([#&#8203;17470](astral-sh/uv#17470))
- Avoid rendering `pyproject.toml` examples for more system-level settings ([#&#8203;17462](astral-sh/uv#17462))

### [`v0.9.25`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#0925)

[Compare Source](astral-sh/uv@0.9.24...0.9.25)

Released on 2026-01-13.

##### Python

- Add CPython 3.15.0a4
- Upgrade Tcl/Tk used by CPython to 9.0

##### Enhancements

- Add `--compile-bytecode` to `uv python install` and `uv python upgrade` to compile the standard library ([#&#8203;17088](astral-sh/uv#17088))
- Allow disabling `exclude-newer` per package ([#&#8203;16854](astral-sh/uv#16854))
- Broadcast `WM_SETTINGCHANGE` on `uv tool update-shell` ([#&#8203;17404](astral-sh/uv#17404))

##### Preview features

- Detect workspace from `uv run` target ([#&#8203;17423](astral-sh/uv#17423))

##### Bug fixes

- Avoid unwrapping size for file responses ([#&#8203;17434](astral-sh/uv#17434))
- Use keyring authentication when retrieving `tool@latest` version ([#&#8203;17448](astral-sh/uv#17448))
- Use latest Pyodide version for each python version ([#&#8203;17372](astral-sh/uv#17372))
- Improve trampoline file handle closing ([#&#8203;17374](astral-sh/uv#17374))
- Fix error message when installing musl python on armv7 ([#&#8203;17213](astral-sh/uv#17213))

</details>

---

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