fix: add EF migration for GrpcNodeAAddress/GrpcNodeBAddress columns on Sites table

src/ScadaLink.ConfigurationDatabase/Migrations/20260321164227_AddGrpcNodeAddresses.cs

@@ -0,0 +1,38 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ScadaLink.ConfigurationDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddGrpcNodeAddresses : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "GrpcNodeAAddress",
+                table: "Sites",
+                type: "nvarchar(max)",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GrpcNodeBAddress",
+                table: "Sites",
+                type: "nvarchar(max)",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "GrpcNodeAAddress",
+                table: "Sites");
+
+            migrationBuilder.DropColumn(
+                name: "GrpcNodeBAddress",
+                table: "Sites");
+        }
+    }
+}

src/ScadaLink.ConfigurationDatabase/Migrations/ScadaLinkDbContextModelSnapshot.cs

@@ -786,6 +786,12 @@ namespace ScadaLink.ConfigurationDatabase.Migrations
                         .HasMaxLength(2000)
                         .HasColumnType("nvarchar(2000)");
 
+                    b.Property<string>("GrpcNodeAAddress")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("GrpcNodeBAddress")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(200)