[fix] Imporved robustness of yuanrong_client when calling clear_partition

[dpj135]

Description

When A is called, batchmeta may contain ( field_name, global_index) that has not been written to the TQ backend.

Main Changes

• Added a bool variable failback to decide if it should raise error when passing unwritten keys.
• Set failback = True to self._route_to_strategies in YuanrongStorageClient.clear()

Self-check

[ascend-robot]

CLA Signature Guide

@dpj135 , thanks for your pull request.

The following commit(s) are not associated with a signed Contributor License Agreement (CLA).

Commit	Reason
d5d9b08f Apply suggestions from code revi...	the email used in the commit is not linked to a signed CLA! please verify that it matches the email you used when signing the CLA.

To sign CLA, click here.

To check if your email is configured correctly, refer to the FAQs.

Once you've signed the CLA or updating your email, please comment /check-cla to revalidate CLA status.

[ascend-robot]

CLA Signature Guide

@dpj135 , thanks for your pull request.

The following commit(s) are not associated with a signed Contributor License Agreement (CLA).

Commit	Reason
d5d9b08f Apply suggestions from code revi...	the email used in the commit is not linked to a signed CLA! please verify that it matches the email you used when signing the CLA.

To sign CLA, click here.

To check if your email is configured correctly, refer to the FAQs.

Once you've signed the CLA or updating your email, please comment /check-cla to revalidate CLA status.

[Copilot]

Pull request overview

Improves YuanrongStorageClient.clear() robustness by allowing it to proceed when some provided custom_backend_meta entries don’t match any configured storage strategy (e.g., metadata for keys that were never written).

Changes:

• Added a failback option to _route_to_strategies() to optionally ignore (instead of error on) unmatched items.
• Enabled this behavior for YuanrongStorageClient.clear() by passing failback=True.

Comments suppressed due to low confidence (1)

transfer_queue/storage/clients/yuanrong_client.py:620

• The Returns section says "Every index appears exactly once", but when failback=True unmatched items are intentionally omitted. Please update this part of the docstring to reflect that some indices may be skipped when failback mode is enabled.

            failback: If True, items that don't match any strategy will be ignored (not included in output).
                      If False, a ValueError will be raised for any unmatched item.

        Returns:
            A dictionary mapping each active strategy to a list of indexes in `items`
            that it should handle. Every index appears exactly once.
        """

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[ascend-robot]

CLA Signature Guide

@dpj135 , thanks for your pull request.

The following commit(s) are not associated with a signed Contributor License Agreement (CLA).

Commit	Reason
d5d9b08f Apply suggestions from code revi...	the email used in the commit is not linked to a signed CLA! please verify that it matches the email you used when signing the CLA.

To sign CLA, click here.

To check if your email is configured correctly, refer to the FAQs.

Once you've signed the CLA or updating your email, please comment /check-cla to revalidate CLA status.