add ability to view Migration History

Oqtane.Server/Repository/MigrationHistoryRepository.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using System.Linq;
+using Oqtane.Models;
+
+namespace Oqtane.Repository
+{
+    public interface IMigrationHistoryRepository
+    {
+        IEnumerable<MigrationHistory> GetMigrationHistory();
+    }
+    public class MigrationHistoryRepository : IMigrationHistoryRepository
+    {
+        private MasterDBContext _db;
+
+        public MigrationHistoryRepository(MasterDBContext context)
+        {
+            _db = context;
+        }
+
+        public IEnumerable<MigrationHistory> GetMigrationHistory()
+        {
+            return _db.MigrationHistory.ToList();
+        }
+    }
+}