message: feat: Reduce calls to `sessionStorage` when checking session life (getsentry/sentry-replay#176)
  This reduces calls to session storage if a session already exists.
  Previously (for sticky sessions), it was calling `fetchSession()` (which
  fetches from session storage) on every `loadSession` call.
diff: @@ -36,7 +36,8 @@ export function getSession({
  stickySession,
  samplingRate,
  }: GetSessionParams) {
  - const session = stickySession ? fetchSession() : currentSession;
  + // If session exists and is passed, use it instead of always hitting session storage
  + const session = currentSession || (stickySession && fetchSession());
  if (session) {
  // If there is a session, check if it is valid (e.g. "last activity" time should be within the "session idle time")
  