Organize blobs on disk by epoch (#14023)

* organize blob directories by period and epoch

* changelog

* remove Indices and replace with Summary

* old PR feedback

* log to advise about the speed of blob migration

* rename level->layer (hoping term is more clear)

* assert path in tests for increased legibility

* lint

* lint

* remove test covering a newly impossible error

* improve feedback from flag validation failure

* Try to clean dangling dirs epoch->flat migration

* lint

* Preston feedback

* try all layouts and short-circuit if base not found

---------

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>

beacon-chain/sync/initial-sync/round_robin.go

@@ -11,7 +11,6 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/das"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/db/filesystem"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/sync"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/verification"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
@@ -70,14 +69,6 @@ func (s *Service) startBlocksQueue(ctx context.Context, highestSlot primitives.S
 		return nil, errors.Wrapf(err, "unable to initialize context version map using genesis validator root = %#x", vr)
 	}
 
-	summarizer, err := s.cfg.BlobStorage.WaitForSummarizer(ctx)
-	if err != nil {
-		// The summarizer is an optional optimization, we can continue without, only stop if there is a different error.
-		if !errors.Is(err, filesystem.ErrBlobStorageSummarizerUnavailable) {
-			return nil, err
-		}
-		summarizer = nil // This should already be nil, but we'll set it just to be safe.
-	}
 	cfg := &blocksQueueConfig{
 		p2p:                 s.cfg.P2P,
 		db:                  s.cfg.DB,
@@ -86,7 +77,7 @@ func (s *Service) startBlocksQueue(ctx context.Context, highestSlot primitives.S
 		ctxMap:              ctxMap,
 		highestExpectedSlot: highestSlot,
 		mode:                mode,
-		bs:                  summarizer,
+		bs:                  s.cfg.BlobStorage,
 	}
 	queue := newBlocksQueue(ctx, cfg)
 	if err := queue.start(); err != nil {