tracking: re-enable Azurite If-Match stat/read tests after missing-target parity fix

[Xuanwo]

Summary

Track an Azurite compatibility gap for conditional stat and read on a missing blob. When If-Match contains a valid ETag obtained from another blob, the live Azure Blob Storage service returns 404 BlobNotFound, while Azurite returns 412 ConditionNotMet.

This is an Azurite parity issue, not an OpenDAL or Azure Blob Storage capability limitation.

Verified behavior

Reproduced with raw Shared Key REST requests using x-ms-version: 2022-11-02. The condition used a valid ETag returned after creating another blob in the same container.

Backend	Version	HEAD missing blob	GET missing blob
Azure Blob Storage	live service	404 BlobNotFound	404 BlobNotFound
Azurite	3.35.0	412 ConditionNotMet	412 ConditionNotMet
Azurite	3.37.0	412 ConditionNotMet	412 ConditionNotMet

A synthetic malformed ETag is not an equivalent reproduction: Azure Storage may itself return 412 for that input. The parity difference is observable when both requests use an ETag issued by the service.

Upstream report: Azure/Azurite#2751

OpenDAL handling

OpenDAL's portable stat/read contract preserves NotFound when the target does not exist, including when if_match is set. The Azure Blob Storage backend satisfies this contract against the live service and should continue advertising stat_with_if_match and read_with_if_match.

Until Azurite matches Azure Storage, its behavior-test configuration should override only these emulator capabilities:

stat_with_if_match=false,read_with_if_match=false

Do not disable the Azure Blob Storage backend capabilities globally. Do not add a client-side existence probe: it would add another request and introduce a time-of-check/time-of-use race.

Completion criteria

• Azurite releases a fix for Blob HEAD and GET return 412 instead of 404 for a missing blob with If-Match Azure/Azurite#2751.
• OpenDAL updates its Azurite test version to a fixed release.
• Missing-target conditional stat and read behavior tests pass against Azurite.
• The two Azurite-only capability overrides are removed.

Related to #8168.

AI assisted with the live-service comparison and drafting. The contributor directed the scope and conclusion.