Python: Update package versions

[dmytrostruk]

No description provided.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	22544	2798	87%

report-only-changed-files is enabled. No files were changed during this commit :)

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
4585	25 💤	0 ❌	0 🔥	1m 22s ⏱️

[Copilot]

Pull request overview

Updates the Python workspace/package versions to 1.0.0rc3 (and associated b260304 prerelease versions for subpackages), aligning pyproject.toml metadata, workspace dependency constraints, the uv.lock lockfile, and the Python changelog for the rc3 release.

Changes:

• Bump agent-framework and core packages from 1.0.0rc2 → 1.0.0rc3.
• Bump Python subpackages from 1.0.0b260225/b260219 → 1.0.0b260304 and update their agent-framework-core minimum constraints accordingly.
• Add 1.0.0rc3 release notes and update compare links in python/CHANGELOG.md; refresh uv.lock entries accordingly.

Reviewed changes

Copilot reviewed 25 out of 26 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
python/uv.lock	Updates locked workspace package versions and refreshes wheel metadata (e.g., adds additional platform wheels).
python/pyproject.toml	Bumps meta-package version to 1.0.0rc3 and pins agent-framework-core[all]==1.0.0rc3.
python/packages/a2a/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/ag-ui/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/anthropic/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/azure-ai-search/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/azure-ai/pyproject.toml	Bumps package version to 1.0.0rc3 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/azure-cosmos/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/azurefunctions/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/bedrock/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/chatkit/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/claude/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/copilotstudio/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/core/pyproject.toml	Bumps agent-framework-core version to 1.0.0rc3.
python/packages/declarative/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/devui/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/durabletask/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/foundry_local/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/github_copilot/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/lab/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/mem0/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/ollama/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/orchestrations/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/purview/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/packages/redis/pyproject.toml	Bumps package version to 1.0.0b260304 and raises agent-framework-core minimum to >=1.0.0rc3.
python/CHANGELOG.md	Adds the 1.0.0rc3 release section and updates compare links ([Unreleased] now compares from python-1.0.0rc3).