LANTERN purge B1: delete the automation chain (Harvester/Conveyor/Fabricator)

Deletes the M7 production systems, automation components/math, authoring, 3
machine prefabs, and 6 test files (-43 tests, 459 green). Trims the automation
paths out of BaseRestoreSystem/SaveStructureScan/BuildPlaceSystem/BuildSendSystem/
HudSystem/HudTheme/StructureCatalogAuthoring/Tuning. RuntimePlacedTag (save
marker, a keeper) re-homed into StructureComponents.cs. StructureType byte codes
stay reserved.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/_Project/Scripts/Server/Building/BuildPlaceSystem.cs

@@ -23,13 +23,11 @@ namespace ProjectM.Server
     public partial struct BuildPlaceSystem : ISystem
     {
         ComponentLookup<LocalTransform> m_TransformLookup;
-        ComponentLookup<Conveyor> m_ConveyorLookup;
 
         [BurstCompile]
         public void OnCreate(ref SystemState state)
         {
             m_TransformLookup = state.GetComponentLookup<LocalTransform>(isReadOnly: true);
-            m_ConveyorLookup = state.GetComponentLookup<Conveyor>(isReadOnly: true);
             state.RequireForUpdate<StructureCatalog>();
             state.RequireForUpdate<BaseAnchor>();
             state.RequireForUpdate<ResourceLedger>();
@@ -43,7 +41,6 @@ namespace ProjectM.Server
         public void OnUpdate(ref SystemState state)
         {
             m_TransformLookup.Update(ref state);
-            m_ConveyorLookup.Update(ref state);
             uint now = SystemAPI.GetSingleton<NetworkTime>().ServerTick.TickIndexForValidTick;
             var anchor = SystemAPI.GetSingleton<BaseAnchor>();
 
@@ -102,12 +99,6 @@ namespace ProjectM.Server
                         });
                         ecb.AddComponent(structure, new RegionTag { Region = RegionId.Base });
                         ecb.AddComponent<RuntimePlacedTag>(structure); // player-built -> persisted by SaveStructureScan
-                        if (req.StructureType == StructureType.Conveyor && m_ConveyorLookup.HasComponent(entry.Prefab))
-                        {
-                            var conv = m_ConveyorLookup[entry.Prefab];
-                            conv.Direction = req.Direction;
-                            ecb.SetComponent(structure, conv);
-                        }
                     }
                 }