Python: Bump Python package versions for 1.14.0 release

[Evan Mattson (moonbox3)]

Motivation & Context

Prepare the Python 1.14.0 release from changes merged since Python 1.13.0. This release ships new stable APIs and fixes across core, providers, workflows, and integrations while keeping breaking changes confined to experimental components within the 1.x release line.

Description & Review Guide

• What are the major changes? Add the 1.14.0 CHANGELOG section and footer links; bump root/core to 1.14.0; apply minor bumps to AG-UI, Foundry, OpenAI, and orchestrations; apply patch bumps to declarative and GitHub Copilot; selectively update changed alpha/beta packages to the Pacific-date 260813 stamp; and regenerate uv.lock. The release validation also adds missing AG-UI and Copilot Studio runtime dependencies and aligns GitHub Copilot metadata with its Python 3.11 SDK requirement.
• What is the impact of these changes? Publishes the accumulated Python features and fixes without moving to 2.0.0. Breaking changes are limited to experimental components. No beta cohort bump was applied. AG-UI's core floor is raised to 1.14.0 because it consumes a new core symbol; other non-root core floors remain unchanged.
• What do you want reviewers to focus on? Verify CHANGELOG coverage and categorization, the 1.14.0 minor-version decision for experimental breaking changes, selective package bumps, prerelease date stamps, dependency metadata corrections, AG-UI/core compatibility, and root/core pin alignment.

Related Issue

This release-preparation PR is not associated with a single issue.

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR is linked to an issue and there is no other open PR for this issue (see Related Issue above).
• This is not a breaking change to stable APIs. Breaking changes in this release are limited to experimental components.

[Copilot]

Pull request overview

Prepares the Python 1.14.0 release with selective package version bumps, corrected runtime metadata, and release notes.

Changes:

• Bumps core/root and affected stable or prerelease packages.
• Adds missing AG-UI and Copilot Studio runtime dependencies.
• Adds the 1.14.0 changelog and regenerates dependency locking.

Reviewed changes

Copilot reviewed 22 out of 23 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
python/pyproject.toml	Bumps root package and core pin to 1.14.0.
python/packages/core/pyproject.toml	Bumps core to 1.14.0.
python/packages/ag-ui/pyproject.toml	Bumps minor version and promotes HTTPX to runtime.
python/packages/foundry/pyproject.toml	Bumps Foundry minor version.
python/packages/openai/pyproject.toml	Bumps OpenAI minor version.
python/packages/orchestrations/pyproject.toml	Bumps orchestrations minor version.
python/packages/declarative/pyproject.toml	Applies a patch bump.
python/packages/github_copilot/pyproject.toml	Applies a patch bump and requires Python 3.11.
python/packages/copilotstudio/pyproject.toml	Updates beta stamp and runtime dependencies.
python/packages/azure-ai-search/pyproject.toml	Updates beta date stamp.
python/packages/azure-contentunderstanding/pyproject.toml	Updates beta date stamp.
python/packages/azure-cosmos-memory/pyproject.toml	Updates alpha date stamp.
python/packages/claude/pyproject.toml	Updates beta date stamp.
python/packages/devui/pyproject.toml	Updates beta date stamp.
python/packages/foundry_hosting/pyproject.toml	Updates beta date stamp.
python/packages/gemini/pyproject.toml	Updates beta date stamp.
python/packages/mem0/pyproject.toml	Updates beta date stamp.
python/packages/mistral/pyproject.toml	Updates beta date stamp.
python/packages/ollama/pyproject.toml	Updates beta date stamp.
python/packages/redis/pyproject.toml	Updates beta date stamp.
python/packages/core/agent_framework/_harness/_background_agents.py	Reformats session-release logic without behavioral change.
python/CHANGELOG.md	Documents 1.14.0 and updates comparison links.
python/uv.lock	Reflects package and dependency metadata updates.

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[github-actions]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/core/agent_framework/_harness
_background_agents.py	344	39	88%	143–144, 146–149, 151–152, 196, 221–222, 247–249, 252–253, 256–257, 413, 423, 427–430, 444, 482–483, 526, 571, 574, 602, 611, 615, 622–623, 678–681
TOTAL	46649	4346	90%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
9411	36 💤	0 ❌	0 🔥	2m 31s ⏱️

[github-actions]

MAF Automated Review — Iteration 1

Result: Findings reported
Scope: full PR (1 commit(s)): 421b90a43d37
Model: gpt-5.6-sol

Overview

This release PR selectively bumps the packages represented in the changelog, keeps the root and core versions aligned, promotes missing runtime dependencies, and regenerates the workspace lockfile. The release guidance and package metadata provide strong guardrails for the selective versioning strategy, and the only core source edit is formatting-only with existing lifecycle tests. One compatibility gap remains: the newly published AG-UI version permits installation with a core release that lacks a symbol AG-UI imports eagerly.

Reviewed the supplied pull-request change set across correctness, security/reliability, architecture, and failure behavior.
1 verified finding remained after source verification (1 medium) across 1 file. Details are attached to the affected lines below.

Affected areas: python/packages/ag-ui/pyproject.toml