Small corner case handling in storage

[Badrish Chandramouli (badrishc)]

No description provided.

[Copilot]

Pull request overview

This PR tightens a few Tsavorite storage edge cases by ensuring (1) scanUncommitted iterators don’t hang when a log is completed, (2) Windows MAX_PATH checks don’t incorrectly reject extended-length paths, and (3) object-page async reads don’t attempt to parse potentially corrupted buffers after I/O failures.

Changes:

• Wake parked scanUncommitted iterators on TsavoriteLog.CompleteLog() and add a regression test to prevent hangs.
• Allow extended-length Windows paths (\\?\...) in LocalStorageDevice/NativeStorageDevice by skipping the MAX_PATH length check for those prefixes.
• Harden object allocator async page-read callback to avoid deserializing from buffers when errorCode != 0.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
libs/storage/Tsavorite/cs/test/test.hlog/LogScanTests.cs	Adds an async regression test to ensure scanUncommitted iterators terminate after CompleteLog().
libs/storage/Tsavorite/cs/src/core/Utilities/Native32.cs	Introduces extended-length path prefix constant and helper to detect \\?\ paths.
libs/storage/Tsavorite/cs/src/core/TsavoriteLog/TsavoriteLog.cs	Ensures CompleteLog() wakes iterators parked in WaitUncommittedAsync.
libs/storage/Tsavorite/cs/src/core/Device/NativeStorageDevice.cs	Skips Windows MAX_PATH enforcement for extended-length paths.
libs/storage/Tsavorite/cs/src/core/Device/LocalStorageDevice.cs	Skips Windows MAX_PATH enforcement for extended-length paths.
libs/storage/Tsavorite/cs/src/core/Allocator/ObjectAllocatorImpl.cs	Avoids parsing/deserializing object records on failed/cancelled async page reads; forwards the error to the “real” callback.