Add 'canceled' status to task::Task

[SneedSeedFeed]

Pull Request

Related issue

Fixes #768

What does this PR do?

Adds the canceled variant to the Task enum.

PR checklist

• Did you use any AI tool while implementing this PR (code, tests, docs, etc.)? No AI was used
• Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)? 'canceled' variant missing from Task enum #768
• Have you read the contributing guidelines? Yes, I've ran clippy, the tests and the check for the wasm example. I did have to run it with specific features to disable the aws crypto as I can't build that on my machine and instead used jwt_rust_crypto, I hope that isn't an issue.
• Have you made sure that the title is accurate and descriptive of the changes? Yes

Notes

Sorry if the commits are a little messy, I wanted to branch off 0.32 on my side so I could use that as a dependency in my own Cargo.toml, I merged it into main before creating this PR though.
Also I wasn't sure on making canceled_by a usize, I did it for consistency with other variants but task ids are usually u32 so I wasn't sure.
Also I kept the 'wrong' spelling of cancelled with 1 'l'

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR adds support for canceled tasks in the Meilisearch Rust SDK by introducing a CanceledTask struct and extending the Task enum with a new Canceled variant. The client's task-waiting logic is updated to handle the canceled status as a terminal state alongside failed and succeeded.

Changes

Cohort / File(s)	Summary
Client task waiting src/client.rs	Modified wait_for_task to immediately return when encountering Task::Canceled status alongside existing Task::Failed and Task::Succeeded terminal states.
Task structure and types src/tasks.rs	Added CanceledTask struct with fields for duration, timestamps, cancellation metadata, and task identifiers. Extended Task enum with Canceled variant. Implemented AsRef<u32> for the new struct. Added deserialization test case for canceled task scenarios.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 A task once running, now complete,
Canceled with grace, a status neat!
The SDK now knows this final state,
No more deserialization fate!
✨ Bugs squashed, the enum is whole!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and concisely summarizes the main change: adding a 'canceled' status to the Task enum, which is the primary objective of this PR.
Linked Issues check	✅ Passed	The PR successfully implements all requirements from issue #768: adds the 'canceled' variant to Task enum, introduces CanceledTask structure, updates deserialization to handle canceled tasks, and includes test coverage.
Out of Scope Changes check	✅ Passed	All changes are directly related to the linked issue #768. The modifications in wait_for_task function align with supporting the new canceled status behavior.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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