revert to using host id ordering for bundle generation

pipeline/05_bundle_gen/main.go

@@ -128,9 +128,7 @@ func main() {
 	// Stage 1: DB fetcher — continuously fetches pages into hostCh
 	go func() {
 		defer close(hostCh)
-		var lastTime *time.Time
 		var lastID int64
-		iconPhase := true // first: hosts with icons (by download time), then: hosts without
 		pageSize := 50000
 		fetched := 0
 		for {
@@ -145,26 +143,14 @@ func main() {
 				}
 			}
 			fetchStart := time.Now()
-			hosts, err := fetchHostsPage(ctx, pool, lastTime, lastID, limit)
+			hosts, err := fetchHostsPage(ctx, pool, lastID, limit)
 			if err != nil {
 				log.Fatalf("Failed to fetch hosts: %v", err)
 			}
 			if len(hosts) == 0 {
-				if iconPhase {
-					// Switch to no-icon hosts
-					iconPhase = false
-					lastTime = nil
-					lastID = 0
-					continue
-				}
 				break
 			}
-			last := hosts[len(hosts)-1]
-			if last.IconDownloadedAt != nil {
-				lastTime = last.IconDownloadedAt
-			} else {
-				lastID = last.ID
-			}
+			lastID = hosts[len(hosts)-1].ID
 			fmt.Printf("[fetcher] %d hosts in %dms (hostCh: %d/%d)\n",
 				len(hosts), time.Since(fetchStart).Milliseconds(), len(hostCh), cap(hostCh))
 			for _, h := range hosts {