chore: bump pytest from 8.4.2 to 9.0.2 (#637)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.4.2 to 9.0.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.2...9.0.2)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -78,7 +78,7 @@ full = [
 # Development tools and testing
 dev = [
     "tsam==3.1.2",  # Time series aggregation for clustering
-    "pytest==8.4.2",
+    "pytest==9.0.2",
     "pytest-xdist==3.8.0",
     "nbformat==5.10.4",
     "ruff==0.14.14",