update caching and server creation

local/repository/system_config_repository.go

@@ -0,0 +1,58 @@
+package repository
+
+import (
+	"acc-server-manager/local/model"
+	"context"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type SystemConfigRepository struct {
+	db *gorm.DB
+}
+
+func NewSystemConfigRepository(db *gorm.DB) *SystemConfigRepository {
+	return &SystemConfigRepository{
+		db: db,
+	}
+}
+
+func (r *SystemConfigRepository) Initialize(ctx context.Context) error {
+	// Migration and seeding are now handled in the db package
+	return nil
+}
+
+func (r *SystemConfigRepository) Get(ctx context.Context, key string) (*model.SystemConfig, error) {
+	var config model.SystemConfig
+	err := r.db.Where("key = ?", key).First(&config).Error
+	if err == gorm.ErrRecordNotFound {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &config, nil
+}
+
+func (r *SystemConfigRepository) GetAll(ctx context.Context) (*[]model.SystemConfig, error) {
+	var configs []model.SystemConfig
+	if err := r.db.Find(&configs).Error; err != nil {
+		return nil, err
+	}
+	return &configs, nil
+}
+
+func (r *SystemConfigRepository) Update(ctx context.Context, config *model.SystemConfig) error {
+	if err := config.Validate(); err != nil {
+		return err
+	}
+
+	config.DateModified = time.Now().UTC().Format(time.RFC3339)
+	return r.db.Model(&model.SystemConfig{}).
+		Where("key = ?", config.Key).
+		Updates(map[string]interface{}{
+			"value":         config.Value,
+			"date_modified": config.DateModified,
+		}).Error
+}