Add MS Teams token exchange duplication check

[sw-joelmut]

Fixes #584

Description

This PR adds functionality to detect duplicated MS Teams token exchange activities, allowing one to continue, and the rest to ignore them.
We also applied some useful changes to the storages by returning the ETag after writing the item.

Testing

The following image shows the functionality working and showing the duplicated messages in console.

[Copilot]

Pull Request Overview

This PR adds functionality to detect duplicated MS Teams token exchange activities, allowing one to continue while the rest are ignored. The implementation uses storage-based deduplication with a new ifNotExists write option and updates all storage implementations to return ETags after write operations.

• Implements token exchange deduplication using storage-based tracking with ifNotExists write option
• Updates all storage implementations (Memory, File, CosmosDB, Blob) to return ETags and support conditional writes
• Removes old token exchange deduplication logic from OAuthFlow and moves it to Authorization class

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
packages/agents-hosting/src/storage/storage.ts	Updates Storage interface to add StorageWriteOptions and return StoreItems from write operations
packages/agents-hosting/src/storage/memoryStorage.ts	Implements conditional write support and ETag return functionality
packages/agents-hosting/src/storage/fileStorage.ts	Adds conditional write support and updates return type
packages/agents-hosting/src/app/authorization.ts	Implements token exchange deduplication logic using storage-based tracking
packages/agents-hosting/src/oauth/oAuthFlow.ts	Removes old deduplication logic and improves error handling
packages/agents-hosting/src/app/agentApplication.ts	Updates flow handling to properly handle undefined token responses from deduplication
packages/agents-hosting-storage-cosmos/src/cosmosDbPartitionedStorage.ts	Implements conditional write operations and ETag return for CosmosDB
packages/agents-hosting-storage-blob/src/blobsStorage.ts	Adds conditional write support and ETag handling for Blob storage
packages/agents-hosting/test/hosting/app/authorization.test.ts	Adds test coverage for duplicate token exchange handling
packages/agents-hosting/test/hosting/oauthflow.test.ts	Removes obsolete test for old deduplication logic
packages/agents-hosting/src/app/turnState.ts	Updates promise type annotation

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[tracyboehrer]

@sw-joelmut Did you test this with Teams ConsentRequired? i.e., Have to click the "Consent" button on the Teams client side?

[sw-joelmut]

@sw-joelmut Did you test this with Teams ConsentRequired? i.e., Have to click the "Consent" button on the Teams client side?

I think i didnt, how could i test that case?

[sw-joelmut]

Hi @tracyboehrer, I pushed more changes to this PR, this functionality keeps working on Blobs, Cosmos, File, and Memory storages. Also, i took into account the issue we fixed yesterday when MS Teams token exchange fails multiple times and defaults to using the magic code.