Fix: Propagate app_user_email when a global context already exists

[IliaMManolov]

🐛 Bug-fix PR

📌 Summary

Fixes the issue outlined here.

🔁 Reproduction Steps

See the issue above.

🐞 Root Cause

See the issue above.

💡 Fix Description

Added the two lines as mentioned in the issue above.

🧪 Verification

Check	Command	Status
Lint suite	make lint	done
Unit tests	make test	done
Coverage ≥ 90 %	make coverage	done
Manual regression no longer fails	steps / screenshots	done

📐 MCP Compliance (if relevant)

• Matches current MCP spec
• No breaking change to MCP clients

✅ Checklist

• Code formatted (make black isort pre-commit)
• No secrets/credentials committed

Screenshots:

[IliaMManolov]

Hi there, I just noticed that 3 of the CI checks failed due to an attempted write to the IBM org package. I presume it's because I don't have some permissions? I hope the PR will still be considered regardless.