feat(notifications): additive Transport column on SmtpConfigurations

src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/SmtpConfiguration.cs

@@ -14,6 +14,14 @@ public class SmtpConfiguration
     public string? Credentials { get; set; }
     /// <summary>Gets or sets the TLS mode (None, StartTLS, or SSL), or null to use the provider default.</summary>
     public string? TlsMode { get; set; }
+
+    /// <summary>
+    /// Gets or sets the email delivery transport ("Smtp" or "Ews"). Null/empty means Smtp
+    /// (legacy rows). Under Ews, <see cref="Host"/> holds the full EWS endpoint URL,
+    /// <see cref="AuthType"/> must be Basic, and Port/TlsMode/OAuth2* are unused.
+    /// </summary>
+    public string? Transport { get; set; }
+
     /// <summary>Gets or sets the sender address placed in the From header.</summary>
     public string FromAddress { get; set; }
     /// <summary>Gets or sets the connection timeout in seconds.</summary>

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Configurations/NotificationConfiguration.cs

@@ -124,6 +124,10 @@ public class SmtpConfigurationConfiguration : IEntityTypeConfiguration<SmtpConfi
         builder.Property(s => s.TlsMode)
             .HasMaxLength(50);
 
+        // Email transport discriminator ("Smtp"/"Ews"); null = Smtp for pre-EWS rows.
+        builder.Property(s => s.Transport)
+            .HasMaxLength(50);
+
         builder.Property(s => s.FromAddress)
             .IsRequired()
             .HasMaxLength(500);

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Migrations/20260810100836_AddSmtpConfigurationTransport.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddSmtpConfigurationTransport : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Transport",
+                table: "SmtpConfigurations",
+                type: "nvarchar(50)",
+                maxLength: 50,
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Transport",
+                table: "SmtpConfigurations");
+        }
+    }
+}

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Migrations/ScadaBridgeDbContextModelSnapshot.cs

@@ -1064,6 +1064,10 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Migrations
                         .HasMaxLength(50)
                         .HasColumnType("nvarchar(50)");
 
+                    b.Property<string>("Transport")
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
                     b.HasKey("Id");
 
                     b.ToTable("SmtpConfigurations");