v2.3.5 Gateway setup bootstrap lockout fixes - Keep setup endpoints open during fresh installer bootstrap until installer completion or the one-hour first-start timeout. - Add explicit /api/setup/complete flow and persisted setup lifecycle settings. - Prevent existing installs and installer reruns from reopening setup bootstrap endpoints. - Leave setup recovery window open after daemon or SSL bootstrap failures, while closing it after successful bootstrap. - Document SETUP_BOOTSTRAP and setup API lockout behavior.