Add Trigger and Problem structs

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pkg/zabbix/models.go

@@ -111,3 +111,20 @@ type ValueMapping struct {
 	Value    string `json:"value"`
 	NewValue string `json:"newvalue"`
 }
+
+type Trigger struct {
+	ID          string     `json:"triggerid"`
+	Description string     `json:"description"`
+	Priority    string     `json:"priority"`
+	Value       string     `json:"value"`
+	Hosts       []ItemHost `json:"hosts,omitempty"`
+	Tags        []Tag      `json:"tags,omitempty"`
+}
+
+type Problem struct {
+	EventID  string `json:"eventid"`
+	ObjectID string `json:"objectid"`
+	Severity string `json:"severity"`
+	Name     string `json:"name"`
+	Tags     []Tag  `json:"tags,omitempty"`
+}