first commit, i i have no idea what i have done

server/internal/models/device.go

@@ -0,0 +1,12 @@
+package models
+
+import "time"
+
+type Device struct {
+	GUID      string   `gorm:"primaryKey"`
+	Name      string   `gorm:"size:255;not null"`
+	Users     []User   `gorm:"many2many:user_devices;joinForeignKey:ID;joinReferences:GUID"`
+	Records   []Record `gorm:"foreignKey:DeviceGUID;references:GUID;constraint:OnDelete:CASCADE"`
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}