chore: Down merge Main to Dev

[PadhiAjit-Microsoft]

Purpose

• ...

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information

[Copilot]

Pull request overview

Updates the deployment documentation to clarify that optional authentication configuration must be applied to both the scenario host app and the chat app after deployment.

Changes:

• Expand the “Configure Authentication (Optional)” section to include both app-scenario-<suffix> and app-chat-<suffix> steps.
• Clarify that both apps should use the same identity provider and note propagation time for changes.

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