Development works:

• Support of “check now” action for items:
  Zabbix API will be extended to support ability to force check of passive items and discovery rules. No update of configuration cache will be performed.

Use case: Customer does changes through API. Does not change items configuration. Requires to initiate LLD discovery.

Check now - simplified version - without immediate config reload.
Required for passive items and discovery rules.

Frontend changes:

• API call for Check Now required.
• Button on item form
• Action on mass update.
• Manual config reload button (out of scope for this task)