feat(#1107): hivectl agents restart / restart-all commands

hive-sh4re/src/lib.rs

@@ -31,6 +31,14 @@ pub enum HostRequest {
         #[serde(default)]
         purge: bool,
     },
+    /// Stop and start a managed container without rebuilding config.
+    /// For "kick the container" operations that don't touch the flake or
+    /// nspawn flags. Mirrors `lifecycle::restart` (kill + start).
+    Restart { name: String },
+    /// Stop and restart all managed containers in sequence. Convenience
+    /// wrapper for `hivectl agents restart-all`; iterates the live
+    /// container list and restarts each one.
+    RestartAll,
     /// Apply pending config to a managed container.
     Rebuild { name: String },
     /// List managed containers.