Add chatty lathes (#34959)

Content.Shared/Research/Components/TechnologyDatabaseComponent.cs

@@ -54,7 +54,7 @@ public sealed partial class TechnologyDatabaseComponent : Component
 /// server to all of it's clients.
 /// </remarks>
 [ByRefEvent]
-public readonly record struct TechnologyDatabaseModifiedEvent;
+public readonly record struct TechnologyDatabaseModifiedEvent(List<string>? NewlyUnlockedRecipes);
 
 /// <summary>
 /// Event raised on a database after being synchronized

Content.Shared/Research/Systems/BlueprintSystem.cs

@@ -7,6 +7,7 @@ using Content.Shared.Research.Prototypes;
 using Content.Shared.Whitelist;
 using Robust.Shared.Containers;
 using Robust.Shared.Prototypes;
+using System.Linq;
 
 namespace Content.Shared.Research.Systems;
 
@@ -64,7 +65,7 @@ public sealed class BlueprintSystem : EntitySystem
 
         _container.Insert(blueprint.Owner, _container.GetContainer(ent, ent.Comp.ContainerId));
 
-        var ev = new TechnologyDatabaseModifiedEvent();
+        var ev = new TechnologyDatabaseModifiedEvent(blueprint.Comp.ProvidedRecipes.Select(it => it.Id).ToList());
         RaiseLocalEvent(ent, ref ev);
         return true;
     }

Content.Shared/Research/Systems/SharedResearchSystem.cs

@@ -301,7 +301,7 @@ public abstract class SharedResearchSystem : EntitySystem
         component.UnlockedRecipes.Add(recipe);
         Dirty(uid, component);
 
-        var ev = new TechnologyDatabaseModifiedEvent();
+        var ev = new TechnologyDatabaseModifiedEvent(new List<string> { recipe });
         RaiseLocalEvent(uid, ref ev);
     }
 }