feat(chat): update chat.getMessages tool to support filtering by thread name

[kamladi]

Example prompt: summarize the messages in the thread linked in https://chat.google.com/room/{spaceId}/{threadId}/{messageId}

Previously, this prompt would result in a failure, as the tool could only paginate across all messages in the space, and was not able to filter by a thread ID. This change allows this type of prompt to succeed, as the tool can now include a threadID filter in the Chat API request.

• Introduces a new optional param threadName to the tool description for chat.getMessages with a description including a sample thread name.
• Updates the ChatService.getMessages function to include a threadName param. If defined, the threadname is included in the "filter" param for the Chat API request.
• Added unit tests

[gemini-code-assist]

Summary of Changes

Hello @kamladi, 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 significantly enhances the chat.getMessages tool by introducing the capability to filter messages by a specific thread name. Previously, the tool could only fetch messages across an entire space, limiting its utility for targeted requests. With this change, users can now accurately query and summarize messages within a particular thread, improving the tool's precision and responsiveness to more complex prompts. The update involves modifications to the tool's input schema, the ChatService logic for constructing API requests, and comprehensive unit tests to ensure correct functionality.

Highlights

• Thread Filtering Support: The chat.getMessages tool now supports filtering messages by a specific thread name, enhancing its ability to retrieve targeted information.
• Enhanced Prompt Handling: This change enables successful processing of prompts that require summarizing messages within a linked thread, addressing a previous limitation where such requests would fail.
• API Parameter Addition: An optional threadName parameter has been introduced to the chat.getMessages tool description and the ChatService.getMessages function, allowing users to specify a thread for filtering.
• Filter Logic Update: The ChatService.getMessages function has been updated to construct the Chat API request filter to include the threadName when provided, and can now combine it with other filters like unreadOnly using logical AND.
• Unit Test Coverage: New unit tests have been added to validate the threadName filtering functionality, including scenarios where it's combined with the unreadOnly filter, ensuring robustness.

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[gemini-code-assist]

Code Review

This pull request adds support for filtering messages by thread name in the chat.getMessages tool. The changes are well-implemented, including updates to the service layer to build the filter query, modifications to the tool definition, and new unit tests to cover the functionality. The approach of using a filters array is scalable for future additions. I have one suggestion to improve code maintainability.

[allenhutchison]

This looks great, thank you for the contribution!