[CosmosDB Trigger Sample] Need to retrieve only documents that actually created or updated

[Yoichi Kawasaki]

Currently cosmosDB Trigger Sample return all documents in the collection. This is a feature request that cosmosDB trigger sample retrieves only documents that actually created or updated.

• Sample: cosmosdb-trigger-cosmosdb-in-binding
• Reference: https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/azure-functions/functions-bindings-documentdb.md

[NOTE] if anyone know the way to achieve this in Python, please contribute to the project!

[Yoichi Kawasaki]

this is achievable in V2 function