fix: System_Message changes in retail.json file to avoid citation in response

[NirajC-Microsoft]

Purpose

This pull request updates the system messages for three agents in the retail.json configuration to enforce stricter response formatting. The key change is a new instruction requiring agents to avoid citations, references, or attribution markers in their answers, ensuring responses are clean, natural text that ends with a polite closing.

Agent system message updates:

• Added a "CRITICAL INSTRUCTION" to the CustomerDataAgent system message, prohibiting citations, references, and attribution markers in responses.
• Added the same "CRITICAL INSTRUCTION" to the OrderDataAgent system message, enforcing clean, citation-free answers.
• Updated the AnalysisRecommendationAgent system message to include the "CRITICAL INSTRUCTION" for citation-free, natural text responses.

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

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Other Information

[github-actions]

🎉 This PR is included in version 3.0.1 🎉

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