Fix blocking TLD sync loop - add missing go keyword

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

main.go

@@ -30,7 +30,7 @@ func main() {
 	go crawler.UpdateStats()
 
 	// Start all loops independently
-	fmt.Println("Starting import, crawl, and stats loops...")
+	fmt.Println("Starting import and processing loops...")
 
 	// Import loop (background) - imports .com domains from vertices.txt.gz
 	go crawler.ImportDomainsInBackground("vertices.txt.gz")
@@ -41,8 +41,8 @@ func main() {
 		"ycombinator.com",
 	})
 
-	// Check loop (background)
-	go crawler.StartCheckLoop()
+	// feed_check loop (background) - checks feeds for new items
+	go crawler.StartFeedCheckLoop()
 
 	// Stats loop (background) - updates once per minute
 	go crawler.StartStatsLoop()
@@ -53,11 +53,14 @@ func main() {
 	// Maintenance loop (background) - WAL checkpoints and integrity checks
 	go crawler.StartMaintenanceLoop()
 
+	// TLD sync loop (background) - syncs with IANA, marks dead TLDs, adds new ones
+	go crawler.startTLDSyncLoop()
+
 	// Publish loop (background) - autopublishes items for approved feeds
 	go crawler.StartPublishLoop()
 
-	// Crawl loop (background) - crawls approved domains for feeds
-	go crawler.StartCrawlLoop()
+	// Domain loop (background) - domain_check + feed_crawl
+	go crawler.StartDomainLoop()
 
 	// Wait for shutdown signal
 	sig := <-sigChan