fix(plugins): close LA5 host lifecycle review

src/AcDream.App/Composition/SessionStartComposition.cs

@@ -4,11 +4,7 @@ using AcDream.Runtime.Session;
 namespace AcDream.App.Composition;
 
 internal sealed record SessionStartDependencies(
-    Action<string> Log,
-    /// <summary>Campaign LA slice LA1: no-op when no statusFile was
-    /// configured.</summary>
-    SessionStatusWriter StatusWriter,
-    string SessionId);
+    Action<string> Log);
 
 /// <summary>
 /// Terminal startup phase. Every callback, command target, and frame root is
@@ -26,9 +22,6 @@ internal sealed class SessionStartCompositionPhase
     public void Start(FrameRootResult frame)
     {
         ArgumentNullException.ThrowIfNull(frame);
-        // Campaign LA slice LA1: "started" = session host start — the
-        // earliest point the graphical host actually attempts to connect.
-        _dependencies.StatusWriter.Started(_dependencies.SessionId);
         RuntimeSessionStartResult result =
             frame.GameRuntime.Session.Start(frame.GameRuntime.Generation);
         Report(result, _dependencies.Log);