fix: move app-action-call status, result, and error to sys [EXT-6783]

[jjolton-contentful]

Summary

• Move status, result, and error fields under sys for AppActionCall
• Update polling logic and tests to check sys.status instead of top-level fields
• Extend raw response props to include createdBy

Description

• Refactored AppActionCall entity to align with Contentful conventions: fields that are system-controlled live inside sys
• Updated pollStructuredAppActionCall to resolve based on sys.status values (succeeded, failed, processing)
• Adjusted unit tests accordingly to mock sys.status, sys.result, and sys.error
• Cleaned up redundant top-level fields

Motivation and Context

• Ensures consistency with how other system-managed fields are represented in Contentful entities
• Reduces risk of user confusion by preventing direct mutation of system-controlled properties
• Brings App Action Call entity and polling behavior in line with long-term design direction

Checklist (check all before merging)

• Both unit and integration tests are passing
• There are no breaking changes
• Changes are reflected in the documentation

[contentful-automation]

🎉 This PR is included in version 11.60.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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[contentful-automation]

🎉 This PR is included in version 12.0.0-beta.10 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀