(#298) Conflict Resolver implementation.

[adrianhall]

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[Copilot]

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

src/CommunityToolkit.Datasync.Client/Offline/OperationsQueue/OperationsQueueManager.cs:352

• Confirm that response.ContentStream is always seekable; if not, this call may throw an exception at runtime.

_ = response.ContentStream.Seek(0L, SeekOrigin.Begin); // Reset the memory stream to the beginning.

src/CommunityToolkit.Datasync.Client/Offline/Operations/PullOperationManager.cs:77

• [nitpick] Since the condition now accesses metadata.UpdatedAt as a non-nullable value, consider removing the '.Value' accessor for consistency.

lastSynchronization = metadata.UpdatedAt.Value;