Fix Messure. Replace Dictionary<> by class.

Clean DbContext.

AsbCloudDb/Model/Measure.cs

@@ -1,6 +1,5 @@
 using Microsoft.EntityFrameworkCore;
 using System;
-using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.Text.Json.Serialization;
@@ -24,7 +23,7 @@ namespace AsbCloudDb.Model
         public DateTime Timestamp { get; set; }
 
         [Column("data", TypeName = "jsonb"), Comment("Данные таблицы последних данных")]
-        public Dictionary<string, object> Data { get; set; }
+        public RawData Data { get; set; }
 
         [Column("is_deleted"), Comment("Пометка удаленным")]
         public bool IsDeleted { get; set; }

AsbCloudDb/Model/RawData.cs

@@ -0,0 +1,9 @@
+using System.Collections.Generic;
+
+namespace AsbCloudDb.Model
+{
+    public class RawData: Dictionary<string, object>
+    {
+
+    }
+}