Every module follows the assigner's new places: the contracts' go/ path, mesh-wants in the delivery contracts, the state and tool assignments (issue 1966)

The legacy key form placement.<node> is gone from the client, so the readers and their fixtures lose it. The check noplacement
now also refuses the assigner's retired names in a manifest.

Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i

modules/mesh-config/module.json

@@ -32,7 +32,7 @@
     "mesh-delivery-indexer.views.manifests",
     "mesh-delivery-indexer.views.predefined",
     "mesh-delivery-indexer.views.config-candidates",
-    "mesh-delivery-assigner.views.placement",
+    "mesh-delivery-assigner.views.assignments",
     "mesh-delivery-assigner.views.wants"
   ],
   "invokes": [
@@ -47,7 +47,7 @@
     "mesh-delivery-indexer.indexer_read_manifests",
     "mesh-delivery-indexer.indexer_read_predefined",
     "mesh-delivery-indexer.indexer_read_config_candidates",
-    "mesh-delivery-assigner.assigner_read_placement",
+    "mesh-delivery-assigner.assigner_read_assignments",
     "mesh-delivery-assigner.assigner_read_wants"
   ],
   "reads": [