Slow-server timeouts no longer block commands on metadata uploads

Best-effort run metadata uploads now have a 15-second total budget, so commands like tuist install don’t block for many minutes when a self-hosted server is slow or unhealthy. This applies to both the foreground upload forced in CI when analytics are useful but not required, and the hidden background analytics upload spawned by normal local commands. Required analytics (build/test report uploads) keep their existing behavior.