chore(main): release 0.3.1

[a2a-bot]

🤖 I have created a release beep boop

0.3.1 (2025-08-13)

Features

• Add agent card as a route in rest adapter (ba93053)

Bug Fixes

• gracefully handle task exceptions in event consumer (#383) (2508a9b)
• openapi working in sub-app (#324) (dec4b48)
• Pass message_length param in get_task() (#384) (b6796b9)
• relax protobuf dependency version requirement (#381) (0f55f55)
• Use HasField for simple message retrieval for grpc transport (#380) (3032aa6)

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This PR was generated with Release Please. See documentation.

[gemini-code-assist]

Summary of Changes

Hello @a2a-bot, 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 is an automated release for version 0.3.1 of the project. The primary change incorporated in this release is a bug fix aimed at relaxing the version constraint for the protobuf dependency, which should improve compatibility.

Highlights

• Automated Release: This pull request represents an automated release for version 0.3.1, generated by the Release Please tool.
• Dependency Management: A key bug fix included in this release relaxes the version requirement for the protobuf dependency, addressing issue #381.

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[gemini-code-assist]

Code Review

This is an automated release PR that updates the changelog for version 0.3.1. The changes look good, I've just left one minor formatting suggestion for the changelog to improve its consistency.

[a2a-bot]

🤖 Created releases:

• v0.3.1

🌻