feat: sync current progress (P0 hardening + P1 observability + deploy docs/systemd)

internal/model/category.go

@@ -0,0 +1,13 @@
+package model
+
+import "time"
+
+type Category struct {
+	ID        uint      `json:"id" gorm:"primaryKey"`
+	UserID    uint      `json:"user_id" gorm:"not null;uniqueIndex:uidx_categories_user_name,priority:1;index"`
+	Name      string    `json:"name" gorm:"size:128;not null;uniqueIndex:uidx_categories_user_name,priority:2"`
+	Type      string    `json:"type" gorm:"size:16;not null"`
+	Color     string    `json:"color" gorm:"size:32"`
+	CreatedAt time.Time `json:"created_at"`
+	UpdatedAt time.Time `json:"updated_at"`
+}