chore: Include python 3.14 in unit test cases

[jsonbailey]

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

Related issues

Mirrors the same change made to the base Python Server SDK in launchdarkly/python-server-sdk@a49588d.

Describe the solution you've provided

Adds Python 3.14 support across all packages in the monorepo:

1. CI matrix (.github/workflows/ci.yml): Added "3.14" to the python-version matrix for all 8 jobs (4 packages × Linux + Windows).
2. PyPI classifiers (pyproject.toml): Added Programming Language :: Python :: 3.14 to classifiers in all 4 packages:
   • packages/sdk/server-ai
   • packages/ai-providers/server-ai-openai
   • packages/ai-providers/server-ai-langchain
   • packages/optimization

Describe alternatives you've considered

N/A — this is a straightforward addition matching the pattern used in the base SDK.

Additional context

Key things for reviewer to verify:

• All 8 CI matrix entries (4 packages × 2 OSes) include "3.14"
• All 4 package pyproject.toml files have the new classifier
• Python 3.14 is available in the GitHub Actions runner images / astral-sh/setup-uv action

Link to Devin session: https://app.devin.ai/sessions/cc69d64d03194a0196cb4adb54c0d8bb
Requested by: @jsonbailey

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Note

Low Risk
Low risk: this only expands CI/test coverage and updates PyPI classifiers, without changing runtime code paths. Main risk is CI failures if Python 3.14 isn’t available or dependencies aren’t yet compatible.

Overview
Adds Python 3.14 to the GitHub Actions CI matrix for all Linux/Windows jobs, expanding unit test runs across all packages.

Updates each package’s pyproject.toml classifiers to advertise support for Python 3.14 on PyPI.

^{Written by Cursor Bugbot for commit f3ceef5. This will update automatically on new commits. Configure here.}

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