Function firstExistingPath

session/store.go:430–435

(primary, fallback string)

	if LocalRuntimeMigrated(s.dir, sessionID) {
		return fmt.Errorf("session %s was migrated to cluster storage and is read-only locally", sessionID)
	}
	return nil
}

func (s *Store) upsertMeta(sessionID string, messageCount, turnCount int, provided *Meta) (*Meta, error) {
	now := float64(time.Now().UnixNano()) / 1e9
	meta := provided
	if meta == nil {
		meta = s.LoadMeta(sessionID)