chore: git cache cleanup

backend/internal/models/security_audit.go

@@ -0,0 +1,20 @@
+package models
+
+import (
+	"time"
+)
+
+// SecurityAudit records admin actions or important changes related to security.
+type SecurityAudit struct {
+	ID            uint      `json:"-" gorm:"primaryKey"`
+	UUID          string    `json:"uuid" gorm:"uniqueIndex"`
+	Actor         string    `json:"actor" gorm:"index"`
+	Action        string    `json:"action"`
+	EventCategory string    `json:"event_category" gorm:"index"`
+	ResourceID    *uint     `json:"resource_id,omitempty"`
+	ResourceUUID  string    `json:"resource_uuid,omitempty" gorm:"index"`
+	Details       string    `json:"details" gorm:"type:text"`
+	IPAddress     string    `json:"ip_address,omitempty"`
+	UserAgent     string    `json:"user_agent,omitempty"`
+	CreatedAt     time.Time `json:"created_at" gorm:"index"`
+}