Receive feedback via multiple identifiers

[leog]

As a user
I want to receive feedback through different handles
So that colleagues can reach me easily

Acceptance Criteria

• Works with:
  • Company email (props.to/john@acme.com)
  • Personal username (props.to/acme/john.doe)
• Unified notification center

Technical Requirements

• Alias resolution service
• Rate limiting to prevent spam