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/store/backend.go

@@ -18,6 +18,8 @@ type Backend interface {
 
 	// ListModules returns all modules for a tenant (control plane may paginate in httpapi).
 	ListModules(tenantID string) []*Module
+	// ListModulesPage returns one page of modules (limit capped by caller).
+	ListModulesPage(tenantID, cursor string, limit int) ([]*Module, string, bool)
 	GetModule(tenantID, moduleID string) (*Module, error)
 	CreateModule(tenantID string, in *Module) (*Module, error)
 	UpdateModule(tenantID, moduleID string, patch *ModulePatch) (*Module, error)
@@ -34,6 +36,7 @@ type Backend interface {
 	DeleteASEntry(tenantID, moduleID, entryID string) error
 	// UpdateASEntryResolveMeta записывает имя AS, число объявленных префиксов и время успешного резолва (pipeline).
 	UpdateASEntryResolveMeta(tenantID, moduleID, entryID string, asnName string, prefixCount int64, resolvedAt time.Time) error
+	UpdateASEntryResolveMetaBatch(tenantID, moduleID string, updates []ASEntryResolveMetaUpdate, resolvedAt time.Time) error
 
 	ListDomainEntries(tenantID, moduleID string) ([]*DomainEntry, error)
 	CreateDomainEntry(tenantID, moduleID string, in *DomainEntry) (*DomainEntry, error)