Introduce Vexer platform scaffolding and enrich Concelier merge

src/StellaOps.Vexer.Storage.Mongo/VexMongoMappingRegistry.cs

@@ -0,0 +1,33 @@
+using System.Threading;
+using MongoDB.Bson.Serialization;
+using MongoDB.Bson.Serialization.Serializers;
+
+namespace StellaOps.Vexer.Storage.Mongo;
+
+public static class VexMongoMappingRegistry
+{
+    private static int _initialized;
+
+    public static void Register()
+    {
+        if (Interlocked.Exchange(ref _initialized, 1) == 1)
+        {
+            return;
+        }
+
+        if (!BsonSerializer.IsSerializerRegistered(typeof(byte[])))
+        {
+            BsonSerializer.RegisterSerializer(new ByteArraySerializer());
+        }
+    }
+}
+
+public static class VexMongoCollectionNames
+{
+    public const string Providers = "vex.providers";
+    public const string Raw = "vex.raw";
+    public const string Claims = "vex.claims";
+    public const string Consensus = "vex.consensus";
+    public const string Exports = "vex.exports";
+    public const string Cache = "vex.cache";
+}