fix: Remove Createdby Parameter from deploy.yml and change logic in bicep

[NirajC-Microsoft]

Purpose

This pull request makes minor adjustments to deployment configuration, specifically around the handling of the createdBy metadata in both the deployment workflow and infrastructure code. The changes improve how the createdBy value is set, making it more robust and context-aware.

Deployment metadata improvements:

• In .github/workflows/deploy.yml, the createdBy environment variable is no longer set during the deployment job, likely to avoid redundancy or potential confusion.

• In infra/main.bicep, the logic for setting the createdBy parameter has been improved: it now uses the username if available, otherwise it falls back to the deployer's object ID, ensuring the field is always populated with meaningful information.

• ...

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