Python: Updated package versions for RC release

[dmytrostruk]

Motivation and Context

• Promoted agent-framework-core and agent-framework-azure-ai to release candidate (1.0.0rc1) per .NET: Release candidate packages #3912 - Updated all remaining 20 non-RC packages from 1.0.0b260212 to 1.0.0b260219
• Updated CHANGELOG.md with rc1 release notes covering 3 breaking changes, 2 additions, and multiple fixes since the last release

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	21244	3303	84%

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

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
4190	239 💤	0 ❌	0 🔥	1m 14s ⏱️

[Copilot]

Pull request overview

This pull request updates Python package versions for the RC release, specifically:

• Promotes agent-framework-core and agent-framework-azure-ai to release candidate status (1.0.0rc1)
• Updates 20 remaining packages from 1.0.0b260212 to 1.0.0b260219
• Updates the root agent-framework meta-package to 1.0.0rc1
• Adds comprehensive CHANGELOG.md entries documenting breaking changes, additions, and fixes since the last release

Changes:

• Two packages (agent-framework-core, agent-framework-azure-ai) are promoted to release candidate (1.0.0rc1)
• Twenty non-RC packages are updated to new beta version (1.0.0b260219)
• CHANGELOG.md documents 3 breaking changes, 2 additions, and multiple bug fixes
• Lock file (uv.lock) updated with new package versions and greenlet s390x architecture wheels

Reviewed changes

Copilot reviewed 24 out of 25 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
python/pyproject.toml	Root meta-package promoted to 1.0.0rc1 with exact dependency on agent-framework-core==1.0.0rc1
python/packages/core/pyproject.toml	Core package promoted to release candidate 1.0.0rc1
python/packages/azure-ai/pyproject.toml	Azure AI package promoted to RC 1.0.0rc1 with dependency on core>=1.0.0rc1
python/packages/a2a/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/ag-ui/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/anthropic/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/azure-ai-search/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/azurefunctions/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/bedrock/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/chatkit/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/claude/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/copilotstudio/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/declarative/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/devui/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/durabletask/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/foundry_local/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/github_copilot/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/lab/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/mem0/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/ollama/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/orchestrations/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/purview/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/packages/redis/pyproject.toml	Updated to beta 1.0.0b260219 with core dependency >=1.0.0b260219
python/CHANGELOG.md	Added 1.0.0rc1 release notes with breaking changes, additions, and fixes; updated version comparison links
python/uv.lock	Updated version entries for all packages and added greenlet 3.3.1 s390x wheels