Add 'Client.list_metrics' API wrapper.

…ation (#1590)

This PR drops the dependency on `cachetools`, which was only used for
its LRU cache class, in favor of a simple local implementation.

This should have a small but positive effect on many downstream users
given how many times this library is downloaded per day.

---------

Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

PR created by the Librarian CLI to initialize a release. Merging this PR
will auto trigger a release.

Librarian Version: v1.0.1
Language Image:
us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:b8058df4c45e9a6e07f6b4d65b458d0d059241dd34c814f151c8bf6b89211209
<details><summary>google-auth: 2.47.0</summary>

##
[2.47.0](googleapis/google-auth-library-python@v2.46.0...v2.47.0)
(2026-01-06)

### Features

* drop `cachetools` dependency in favor of simple local implementation
(#1590)
([5c07e1c4](googleapis/google-auth-library-python@5c07e1c4))

### Bug Fixes

* Python 3.8 support (#1918)
([60dc2001](googleapis/google-auth-library-python@60dc2001))

</details>

This fixes four broken tests that failed due to an unexpected change in the Google Public Dataset: Hacker News.

The `comments` table was deleted and only the `full` table remained.

This edit updates the name of the table in four tests and updates the names of columns in the table as well as updates the expected results for one of the tests.

Fixes #1590 🦕

* [WIP] implement range rolling with mods at expression level

* implement range rolling for series

* fix lint

* update rewrite logic

* fix mypy

* differentiate range bound and unbounded window

* fix mypy

* relax sorting key search algo

* check whether window key is prefix

* address comments

* fix type hint

* add comment on skipping range window during order pull up

* fix lint

* check order for all AdditiveNode

* explicitly dispatch additive nodes