Event retention (#23)

Signed-off-by: link <a624669980@163.com>

model/event.go

@@ -0,0 +1,13 @@
+package model
+
+type EventModel struct {
+	UUID       string `gorm:"primaryKey" json:"uuid"`
+	SourceID   string `gorm:"index" json:"source_id"`
+	Name       string `json:"name"`
+	Properties string `gorm:"serializer:json" json:"properties"`
+	Timestamp  int64  `gorm:"autoCreateTime:milli" json:"timestamp"`
+}
+
+func (p *EventModel) TableName() string {
+	return "events"
+}