deps(ai-assistant)(deps): Bump cachetools in /ai-assistant (#287)

Bumps [cachetools](https://github.com/tkem/cachetools) from 6.2.5 to 7.0.0.
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](tkem/cachetools@v6.2.5...v7.0.0)

---
updated-dependencies:
- dependency-name: cachetools
  dependency-version: 7.0.0
  dependency-type: indirect
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

ai-assistant/requirements.txt

@@ -15,7 +15,7 @@ authlib==1.6.6
 beartype==0.22.9
 boto3==1.42.39
 botocore==1.42.39
-cachetools==6.2.5
+cachetools==7.0.0
 certifi==2026.1.4
 cffi==2.0.0
 charset-normalizer==3.4.4