Improve CLI and daemon lifecycle usability

docs/architecture.md

@@ -26,6 +26,8 @@ accept and live-sync tasks, releases native docs/gossip/blob handles, calls
 `Endpoint::close().await`, and removes the local control socket. The same
 cleanup path runs when the serving loop returns an error, preventing stale
 socket files and unclosed endpoint clones from becoming restart behavior.
+Foreground daemons handle Ctrl-C, and Unix daemons also handle the SIGTERM used
+by user service managers, through this same graceful shutdown path.
 
 The local metadata store is SQLite product state. `geth-store` tracks a numeric
 `schema_version` in the `meta` table and applies ordered migrations up to the
@@ -44,6 +46,14 @@ daemon. The initial backends are systemd user units on Linux, launchd user agent
 on macOS, and per-user scheduled tasks on Windows. Geth does not install itself
 as a privileged system service.
 
+The common service lifecycle is available directly as `geth daemon
+install|start|stop|status|uninstall`; the nested service commands remain the
+advanced and compatibility surface. `geth daemon run --ephemeral` creates a
+temporary home, reports how another CLI process can select it with `--home`, and
+removes it after a normal foreground shutdown. Ephemeral mode still starts the
+same daemon-owned Iroh endpoint and local control stack; it is not a second
+runtime or transport path.
+
 ## Iroh-Only Remote Communication
 
 Remote geth node-to-node communication is Iroh-only. The daemon will own one