fix(agent): raise the CancelError when interruption happens during the tool execution

[DavdGao]

AgentScope Version

1.0.6

Description

As the title says.

Checklist

Please check the following items before code is ready to be reviewed.

• Code has been formatted with pre-commit run --all-files command
• All tests are passing
• Docstrings are in Google style
• Related documentation has been updated (e.g. links, examples, etc.)
• Code is ready for review

[Copilot]

Pull Request Overview

This PR implements interrupt handling for the ReAct agent by propagating interruption signals through the async execution flow. When a tool execution is interrupted, the agent now properly detects and responds to the interruption.

• Adds check for chunk.is_interrupted in _acting() to raise CancelledError
• Adds is_interrupted metadata field to the interruption response message
• Fixes duplicate await self.print() call in handle_interrupt()

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[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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