Fix issues with Journal handling

Implement basic database
Handle startup events
only send events after the most recent LoadGame

Pulsar/Context/Configuration/MaterialsConfiguration.cs

@@ -0,0 +1,25 @@
+namespace Pulsar.Context.Configuration;
+
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Observatory.Framework.Files.Journal.Startup;
+
+public class MaterialsConfiguration : IEntityTypeConfiguration<Materials>
+{
+    public void Configure(EntityTypeBuilder<Materials> builder)
+    {
+        builder.HasKey(x => x.Timestamp);
+        builder.OwnsMany(x => x.Raw, b =>
+        {
+            b.ToJson();
+        });
+        builder.OwnsMany(x => x.Encoded, b =>
+        {
+            b.ToJson();
+        });
+        builder.OwnsMany(x => x.Manufactured, b =>
+        {
+            b.ToJson();
+        });
+    }
+}