Id and PartitionKey properties are missing on ChangeFeedMetadata class

[JensSchadron]

We are continuously addressing and improving the SDK, if possible, make sure the problem persist in the latest SDK version.

Describe the bug
When using the full fidelity change feed mode (AllVersionsAndDeletions), I'm using the ChangeFeedItem<T> wrapper class to receive either the creation, update or deletion of the a document. However, upon deletion, I should be able to receive the id and partitionkey of the deleted document in the ChangeFeedMetadata property as stated in the docs. (https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/change-feed-modes?tabs=all-versions-and-deletes#parse-the-response-object-1) However, those 2 specific properties are missing on the object.

To Reproduce

1. Set up an AllVersionsAndDeletions changefeed
2. Delete a document from the collection being observed by the changefeed
3. Observe ChangeFeedMetadata property of ChangeFeedItem for the deleted document

Expected behavior
I can use the id and partitionkey properties from the ChangeFeedMetadata class.

Actual behavior
The 2 mentioned properties are missing.

Environment summary
SDK Version: 3.47.0-preview.0

Additional context
N/A

[JensSchadron]

Also noticed that the Previous property of ChangeFeedItem<T> is seemingly never filled in, despite the XML docs mentioning that it should be the case.

azure-cosmos-dotnet-v3/Microsoft.Azure.Cosmos/src/Resource/FullFidelity/ChangeFeedItem.cs

Lines 73 to 78 in a5469f2

	/// <summary>
	/// For delete operations, previous image is always going to be provided. The previous image on replace operations is not going to be exposed by default and requires account-level or container-level opt-in.
	/// </summary>
	[JsonProperty(PropertyName = "previous", NullValueHandling = NullValueHandling.Ignore)]
	[JsonPropertyName("previous")]
	public T Previous { get; set; }

[JensSchadron]

And... just noticed that there's apparently a PR (#4922, albeit drafted) that should resolve the original issue (as well as the XML doc that I just mentioned)...