fix: don't cache deleted configs

On the aws cluster, we had two HelmReleases (any many other duplicates)
under the same scraper with same KNN & external ids. One of them is
deleted & the other is active.

On cache init, we would fetch both the helm releases but the older
(deleted) one would replace the active one in the cache.

api/cache.go

@@ -114,7 +114,7 @@ func QueryCache(ctx context.Context, query string, args ...interface{}) (*TempCa
 		aliases: make(map[string]string),
 	}
 	items := []models.ConfigItem{}
-	if err := ctx.DB().Table("config_items").Where(query, args...).Find(&items).Error; err != nil {
+	if err := ctx.DB().Table("config_items").Where("deleted_at IS NULL").Where(query, args...).Find(&items).Error; err != nil {
 		return nil, err
 	}
 	for _, item := range items {

api/context.go

@@ -33,6 +33,7 @@ func (ctx ScrapeContext) withTempCache(cache *TempCache) ScrapeContext {
 	ctx.temp = cache
 	return ctx
 }
+
 func (ctx ScrapeContext) InitTempCache() (ScrapeContext, error) {
 	if ctx.ScrapeConfig().GetPersistedID() == nil {
 		cache, err := QueryCache(ctx.Context, "scraper_id IS NULL")