Feedback metrics by CSA name: show full names

[RiinaLi]

AS AN Administrator
I WANT to display the full advisor name (first and last name) instead of just the first name under "Lisavalikud" for feedback metrics
SO THAT I can accurately identify the specific advisor when analyzing feedback and conversations

Acceptance Criteria

• Replace the advisor's first name with their full name (first and last name) in the "Lisavalikud" view
• Ensure the full name is fetched from the "Nimi" field in the user data.

Additional:

Connected to another task: #361

[ffrose]

Works as intended.