refactor(maintenance): remove hardcoded retention and wire scheduler

RunPeriodicMaintenance и RunCleanup удалены; scheduler политик в StartBackground; deprecated /postgres/cleanup принимает policy_id.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/ingest/run.go

@@ -17,8 +17,6 @@ type Deps struct {
 	Store store.Backend
 }
 
-var lastMaintenance time.Time
-
 // Run blocks until ctx is cancelled.
 func Run(ctx context.Context, deps *Deps) {
 	cfg := config.Load()
@@ -36,10 +34,6 @@ func Run(ctx context.Context, deps *Deps) {
 			log.Printf("evobgp-ingest: stopped")
 			return
 		case <-t.C:
-			if deps.Store != nil && time.Since(lastMaintenance) > time.Hour {
-				deps.Store.RunPeriodicMaintenance(ctx)
-				lastMaintenance = time.Now()
-			}
 			prefetchCtx, cancel := context.WithTimeout(ctx, 50*time.Second)
 			err := pipeline.PrefetchCDNSourceETags(prefetchCtx, deps.Store, hc)
 			cancel()