fix: lower python 3.14 pandas floor

[stefan-jansen]

Summary

• lower the Python 3.14 pandas floor from >=3.0.0 to >=2.3.3
• keep the Python 3.14 scientific stack otherwise unchanged
• avoid unnecessary downstream conflicts with libraries that still cap below pandas 3

Validation

• uv run ruff check src tests .github
• uv run ty check
• uv build
• exact-minimum Python 3.14 check with pandas==2.3.3: 2752 passed, 65 skipped, 24 deselected
• release-clone suite: 2752 passed, 65 skipped, 24 deselected

[Copilot]

Pull request overview

This PR lowers the Python 3.14 minimum supported pandas version from >=3.0.0 to >=2.3.3 so the package remains compatible with more downstream dependency sets while keeping the rest of the 3.14 scientific stack unchanged.

Changes:

• Updated the Python 3.14 pandas requirement in pyproject.toml to >=2.3.3.
• Updated the corresponding requirement metadata in uv.lock.
• Added a changelog entry documenting the dependency-floor change.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
uv.lock	Updates the locked dependency requirement metadata for Python 3.14 pandas.
pyproject.toml	Lowers the published Python 3.14 pandas floor in project dependencies.
CHANGELOG.md	Documents the dependency-floor change for the next beta release.

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