[Enhancement]: Separate or additional email support for sales

### Affected Area

None

### Problem Statement

We already have support for sending different notifications to different emails if set. Need to add one for Partner Lead notifications.

### Proposed Solution

_No response_

Start by locating the existing support for sending different notifications to different email addresses, then find where Partner Lead notifications are handled. Determine how an additional recipient should be configured and verify that Partner Lead notifications can use it separately from existing notification emails.

Written by the indexing model from the issue text.