NethVoice CTI: Auto-enable/disable DND on CTI/NethLink login/logout

[andrea-marchionni]

Description:
It would be useful to automatically manage the DND (Do Not Disturb) status based on the user’s CTI or NethLink session state.

Proposed behavior:

1. On logout from NethVoice CTI and/or NethLink:
   Automatically set the user status to DND = ON

2. On login to NethVoice CTI and/or NethLink:
   Automatically remove DND (set DND = OFF)

Additional notes:

• These should be two separate configurable options (independent toggles), so administrators can enable only one or both behaviors.
• This would help ensure accurate presence status and avoid calls being routed to offline users.

Use case:
Agents who forget to manually toggle DND when starting or ending their shift, leading to missed calls or incorrect availability status.