V1.25.0

[wyf7107]

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[gemini-code-assist]

Summary of Changes

Hello @wyf7107, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the ADK Python library to version 1.25.0, incorporating a comprehensive set of new features, critical bug fixes, and general improvements. The changes enhance core functionalities, expand AI model capabilities, refine development tools, and improve web server stability and diagnostics, aiming to deliver a more robust and feature-rich platform.

Highlights

• Core Features: Added a demo for the simple prompt optimizer, a --auto_create_session flag to the adk api_server CLI, an add_events_to_memory facade for event-delta, post-invocation token-threshold compaction with event retention, and report generation to the adk conformance test command.
• Model Enhancements: Introduced a base_url option to the Gemini LLM class.
• Tooling Improvements: Enhanced Google credentials config to support externally passed access tokens, updated the agent simulator with improved prompts and environment data, added a tool to load MCP resources, and integrated SkillToolset into ADK.
• Web Server Functionality: Added /health and /version endpoints to the ADK web server.
• Bug Fixes: Resolved issues including async iteration for VertexAiSessionService pagination, an event loop closed bug in McpSessionManager, preservation of thought_signature in function call conversions, propagation of grounding and citation metadata in streaming responses, added endpoints for artifact version metadata, supported escaped curly braces in instruction templates, stripped timezone for PostgreSQL timestamps, handled None prompt tokens in streaming mode, passed invocation_id from /run to Runner.run_async, conditionally preserved function call IDs in LLM requests, migrated VertexAiMemoryBankService to use the async Vertex AI client, handled list values in Gemini schema sanitization, and switched to using a logger instead of print in MCP.
• General Improvements: Replaced instance checks for LlmAgent with hasAttribute checks and improved logging of exception details before re-raising in MCP session execution.

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Changelog

• CHANGELOG.md
  • Added detailed release notes for version 1.25.0, including new features, bug fixes, and improvements.

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[gemini-code-assist]

Code Review

This pull request prepares for the v1.25.0 release by updating the version in src/google/adk/version.py and adding a comprehensive list of new features, bug fixes, and improvements to CHANGELOG.md. The changes look good overall. I've added a couple of minor suggestions to improve the wording of some entries in the changelog for better readability.

[gemini-code-assist]

For clarity and better grammar, consider rephrasing this changelog entry. For example: 'Replaced print with logger for logging in MCP'.

Suggested change

	* Used logger to log instead of print in MCP ([6bc70a6](https://github.com/google/adk-python/commit/6bc70a6bab79b679a4b18ad146b3450fb9014475))
	* Replaced `print` with logger for logging in MCP ([6bc70a6](https://github.com/google/adk-python/commit/6bc70a6bab79b679a4b18ad146b3450fb9014475))

[gemini-code-assist]

To improve clarity and technical precision, consider rephrasing this entry. Using backticks for code elements like isinstance and hasattr would also improve readability.

Suggested change

	* Replace check of instance for LlmAgent with hasAttribute check ([7110336](https://github.com/google/adk-python/commit/7110336788662abb8c9bbbb0a53a50cc09130d5e))
	* Replace `isinstance` check for `LlmAgent` with `hasattr` check ([7110336](https://github.com/google/adk-python/commit/7110336788662abb8c9bbbb0a53a50cc09130d5e))