Python: Update Python package versions to rc2

[dmytrostruk]

• Bump core and azure-ai to 1.0.0rc2
• Bump preview packages to 1.0.0b260225
• Update dependencies to >=1.0.0rc2
• Add CHANGELOG entries for changes since rc1
• Update uv.lock

[Copilot]

Pull request overview

This PR updates the Python workspace package set to the next release candidate/preview versions, aligning internal package versions and dependency minimums, refreshing the lockfile, and documenting changes since rc1.

Changes:

• Bump agent-framework / agent-framework-core / agent-framework-azure-ai to 1.0.0rc2 and preview packages to 1.0.0b260225.
• Update package dependencies to require agent-framework-core>=1.0.0rc2 and regenerate python/uv.lock.
• Add 1.0.0rc2 release notes to python/CHANGELOG.md.

Reviewed changes

Copilot reviewed 28 out of 29 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
python/uv.lock	Updates locked workspace package versions and resolved dependency markers.
python/pyproject.toml	Bumps meta-package version to rc2 and pins agent-framework-core[all]==1.0.0rc2.
python/packages/a2a/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/ag-ui/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/anthropic/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/azure-ai/pyproject.toml	Bumps Azure AI package to rc2; updates core dependency floor to rc2.
python/packages/azure-ai-search/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/azure-ai-search/tests/test_aisearch_context_provider.py	Minor test cleanup/formatting aligned with updated imports/formatting.
python/packages/azurefunctions/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/bedrock/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/chatkit/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/claude/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/copilotstudio/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/core/pyproject.toml	Bumps core package version to rc2.
python/packages/core/agent_framework/_skills.py	Formatting-only adjustments in the skills provider implementation.
python/packages/core/tests/core/test_function_invocation_logic.py	Assertion message formatting cleanup.
python/packages/core/tests/core/test_skills.py	Whitespace-only formatting tweak.
python/packages/declarative/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/devui/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/durabletask/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/foundry_local/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/github_copilot/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/lab/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/mem0/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/ollama/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/orchestrations/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/purview/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/packages/redis/pyproject.toml	Bumps preview version; updates core dependency floor to rc2.
python/CHANGELOG.md	Adds 1.0.0rc2 release notes section.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/core/agent_framework
_skills.py	225	11	95%	154–155, 168–169, 279–281, 316–317, 397, 584
TOTAL	22033	2775	87%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
4624	244 💤	0 ❌	0 🔥	1m 14s ⏱️