fix(gmail): improve attachment data handling

[Lubrsy706]

Summary

• pad Gmail attachment data responses from users.messages.attachments.get so standard base64url decoders can consume them directly
• keep the normalization scoped to the Gmail attachment get method
• update the save-email-attachments recipe to decode attachment bytes before upload and use the current gws drive +upload file argument form
• add a patch changeset

This combines and refreshes the attachment-related fixes from #795 and #797 after those PRs were closed by the stale bot.

Testing

• cargo test -p google-workspace-cli test_pad_gmail_attachment_data
• git diff origin/main..HEAD --check

[changeset-bot]

🦋 Changeset detected

Latest commit: 761a113

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@googleworkspace/cli	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[gemini-code-assist]

Summary of Changes

Hello, 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 addresses issues with Gmail attachment data handling by introducing automatic padding for base64url encoded responses. By normalizing these responses at the point of retrieval, the CLI ensures that downstream tools can consume the data without manual intervention. Additionally, the documentation and recipes have been updated to reflect the recommended workflow for downloading and decoding these attachments.

Highlights

• Gmail Attachment Padding: Implemented automatic base64url padding for Gmail attachment responses to ensure compatibility with standard decoders.
• Recipe Update: Updated the 'save-email-attachments' recipe to include a robust decode-and-upload flow using base64 decoding.
• Testing: Added comprehensive unit tests to verify the padding logic and ensure it remains scoped only to the relevant Gmail API method.

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[gemini-code-assist]

Code Review

This pull request improves Gmail attachment handling by ensuring base64-encoded attachment data is correctly padded in JSON responses. It introduces a normalize_json_response function in the executor to handle specific method requirements, specifically adding '=' padding for the gmail.users.messages.attachments.get endpoint. The documentation and recipes were also updated to include a decode-and-upload flow using jq and python3 for base64url decoding, and unit tests were added to verify the padding logic. I have no feedback to provide.