Bug: insert_check_updates_in_event_queue trigger never fires events

[adityathebe]

The condition for filtering status values uses incorrect boolean logic.

Problematic code:

IF NEW.status != 'healthy' OR NEW.status != 'unhealthy' THEN
    RETURN NULL;
END IF;

This condition always evaluates to TRUE, causing the function to return NULL for every status value:

• When status is 'healthy': != 'unhealthy' is TRUE
• When status is 'unhealthy': != 'healthy' is TRUE
• Any other status: both conditions are TRUE

As a result, no events are ever inserted into event_queue regardless of status changes.