fix: dynamodb fixes

Signed-off-by: Ramkumar Chinchani <rchincha.dev@gmail.com>

Author: rchincha

pkg/storage/cache/dynamodb.go

@@ -14,6 +14,7 @@ import (
 
 	zerr "zotregistry.dev/zot/v2/errors"
 	zlog "zotregistry.dev/zot/v2/pkg/log"
+	"zotregistry.dev/zot/v2/pkg/storage/constants"
 )
 
 type DynamoDBDriver struct {
@@ -186,11 +187,22 @@ func (d *DynamoDBDriver) PutBlob(digest godigest.Digest, path string) error {
 		return zerr.ErrEmptyValue
 	}
 
-	if originBlob, _ := d.GetBlob(digest); originBlob == "" {
+	originBlob, _ := d.GetBlob(digest)
+	if originBlob == "" {
 		// first entry, so add original blob
 		if err := d.putOriginBlob(digest, path); err != nil {
+			d.log.Error().Err(err).Str("bucket", constants.OriginalBucket).Str("value", path).Msg("failed to put record")
+
 			return err
 		}
+
+		d.log.Debug().Str("digest", digest.String()).Str("path", path).Msg("inserted in original bucket")
+
+		return nil
+	} else if originBlob == path { // idempotent
+		d.log.Debug().Str("digest", digest.String()).Str("path", path).Msg("inserted same key in original bucket")
+
+		return nil
 	}
 
 	expression := "ADD DuplicateBlobPath :i"
@@ -202,6 +214,8 @@ func (d *DynamoDBDriver) PutBlob(digest godigest.Digest, path string) error {
 		return err
 	}
 
+	d.log.Debug().Str("digest", digest.String()).Str("path", path).Msg("inserted in duplicates bucket")
+
 	return nil
 }