perf: optimize data path, indexes and frontend virtualization

- Убран latestCDNRowsBySource; expanded BIRD preview генерируется on-demand
- Batch AS meta updates; миграция perf-индексов 000012
- VirtualPrefixList для preview префиксов; метрики pipeline refresh
- PolitePause для RIPEstat после cache miss

Co-authored-by: Cursor <[email protected]>

internal/repository/postgres_entities.go

@@ -325,6 +325,38 @@ func (p *Postgres) UpdateASEntryResolveMeta(tenantID, moduleID, entryID string,
 	return nil
 }
 
+func (p *Postgres) UpdateASEntryResolveMetaBatch(tenantID, moduleID string, updates []store.ASEntryResolveMetaUpdate, resolvedAt time.Time) error {
+	if len(updates) == 0 {
+		return nil
+	}
+	if _, err := p.GetModule(tenantID, moduleID); err != nil {
+		return err
+	}
+	ctx := context.Background()
+	batch := &pgx.Batch{}
+	for _, u := range updates {
+		var nameArg any
+		sn := strings.TrimSpace(u.ASNName)
+		if sn == "" {
+			nameArg = nil
+		} else {
+			nameArg = sn
+		}
+		batch.Queue(`
+			UPDATE module_as_entry SET asn_name=$3, prefix_count=$4, asn_resolved_at=$5, updated_at=now()
+			WHERE id=$1 AND module_id=$2`,
+			u.EntryID, moduleID, nameArg, u.PrefixCount, resolvedAt.UTC())
+	}
+	br := p.pool.SendBatch(ctx, batch)
+	defer func() { _ = br.Close() }()
+	for range updates {
+		if _, err := br.Exec(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func (p *Postgres) DeleteASEntry(tenantID, moduleID, entryID string) error {
 	if _, err := p.GetModule(tenantID, moduleID); err != nil {
 		return err