chore(mesh): mark Phase 2 tasks 6-7 complete

Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW

docs/plans/2026-07-22-mesh-phase2-clusterclient-transport.md.tasks.json

@@ -78,21 +78,24 @@
     {
       "id": 6,
       "subject": "Task 6: wire both sides, receptionist registration, pin the wire-contract actor paths",
-      "status": "pending",
+      "status": "completed",
       "classification": "standard",
       "blockedBy": [
         3,
         5
-      ]
+      ],
+      "commit": "16d59856",
+      "note": "Dropped a planned 'not a singleton' assertion: two candidate discriminators were both invalid (a SingletonManager also sits at /user/<name>; /singleton is null even for the known singleton config-publish). A sabotage re-registering via WithSingleton left both green, which exposed them. Property deferred to Task 8."
     },
     {
       "id": 7,
       "subject": "Task 7: route the five publish sites through the mesh router (nullable, mediator fallback)",
-      "status": "pending",
+      "status": "completed",
       "classification": "standard",
       "blockedBy": [
         6
-      ]
+      ],
+      "note": "Sabotage-verified by inverting the branch: all 6 tests red. Comm actor registration moved above the singletons so registry.Get works; an earlier ResolveOne().GetAwaiter().GetResult() blocked inside a props factory."
     },
     {
       "id": 8,