chunks-inspect: print chunk version (format) (#9490)

Get the version byte of the current inspecting Loki chunk printed.

cmd/chunks-inspect/loki.go

@@ -62,6 +62,7 @@ const (
 )
 
 type LokiChunk struct {
+	format   byte
 	encoding Encoding
 
 	blocks []LokiBlock
@@ -149,6 +150,7 @@ func parseLokiChunk(chunkHeader *ChunkHeader, r io.Reader) (*LokiChunk, error) {
 	metadata = metadata[n:]
 
 	lokiChunk := &LokiChunk{
+		format:                   f,
 		encoding:                 compression,
 		metadataChecksum:         metaChecksum,
 		computedMetadataChecksum: computedMetaChecksum,

cmd/chunks-inspect/main.go

@@ -65,6 +65,7 @@ func printFile(filename string, blockDetails, printLines, storeBlocks bool) {
 		return
 	}
 
+	fmt.Println("Format (Version):", lokiChunk.format)
 	fmt.Println("Encoding:", lokiChunk.encoding)
 	fmt.Print("Blocks Metadata Checksum: ", fmt.Sprintf("%08x", lokiChunk.metadataChecksum))
 	if lokiChunk.metadataChecksum == lokiChunk.computedMetadataChecksum {