Utilize UUID v7 for log lines/files, as well as snapshot IDs (#576)

The server side already overwrites assigned log line/file IDs with ULIDs,
so this does not make any practical difference for them.

Collector provided snapshot IDs are currently mainly intended for
debugging purposes (the server-side assigns its own ID), but it seems
reasonable to use a more index-friendly ID here as well.

logs/parse.go

@@ -620,7 +620,7 @@ func ParseAndAnalyzeBuffer(logStream LineReader, linesNewerThan time.Time, serve
 		logLine.ByteEnd = byteStart + int64(len(line))
 
 		// Generate unique ID that can be used to reference this line
-		logLine.UUID, err = uuid.NewRandom()
+		logLine.UUID, err = uuid.NewV7()
 		if err != nil {
 			fmt.Printf("Failed to generate log line UUID: %s", err)
 			continue

output/compact.go

@@ -26,7 +26,7 @@ func uploadAndSubmitCompactSnapshot(ctx context.Context, s pganalyze_collector.C
 	var err error
 	var data []byte
 
-	snapshotUUID, err := uuid.NewRandom()
+	snapshotUUID, err := uuid.NewV7()
 	if err != nil {
 		logger.PrintError("Error generating snapshot UUID: %s", err)
 		return err

output/full.go

@@ -47,7 +47,7 @@ func submitFull(ctx context.Context, s snapshot.FullSnapshot, server *state.Serv
 	var err error
 	var data []byte
 
-	snapshotUUID, err := uuid.NewRandom()
+	snapshotUUID, err := uuid.NewV7()
 	if err != nil {
 		logger.PrintError("Error generating snapshot UUID: %s", err)
 		return err

runner/logs.go

@@ -217,7 +217,7 @@ func setupLogStreamer(ctx context.Context, wg *sync.WaitGroup, globalCollectionO
 				}
 
 				in.LogLine.CollectedAt = time.Now()
-				in.LogLine.UUID, err = uuid.NewRandom()
+				in.LogLine.UUID, err = uuid.NewV7()
 				if err != nil {
 					logger.PrintError("Could not generate log line UUID: %s", err)
 					continue

state/logs.go

@@ -191,7 +191,7 @@ func NewLogFile(tmpFile *os.File, originalName string) (LogFile, error) {
 			return LogFile{}, fmt.Errorf("error allocating tempfile for logs: %s", err)
 		}
 	}
-	uuid, err := uuid.NewRandom()
+	uuid, err := uuid.NewV7()
 	if err != nil {
 		return LogFile{}, fmt.Errorf("error generating log file UUID: %s", err)
 	}