fix: Update Created by tag logic to dev-v3 branch

[NirajC-Microsoft]

Purpose

This pull request makes a targeted update to the way the createdBy tag parameter is determined in the infra/main.bicep file. The logic now checks if the userPrincipalName property exists on the deployer; if it does, it uses the username portion, otherwise it falls back to the deployer's objectId.

• Improved handling of the createdBy tag:
  • The createdBy parameter now checks for the existence of userPrincipalName on the deployer object, and uses either the username (before the @) or falls back to the deployer's objectId if not present.

• ...

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