fix(sms): S2 review — add DeleteSmsConfigurationAsync + schema/repo tests + doc nit

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

@@ -57,8 +57,7 @@ public class NotificationRecipientConfiguration : IEntityTypeConfiguration<Notif
 
 public class SmsConfigurationConfiguration : IEntityTypeConfiguration<SmsConfiguration>
 {
-    /// <summary>Configures the EF Core mapping for <see cref="SmsConfiguration"/>.</summary>
-    /// <param name="builder">The entity type builder.</param>
+    /// <inheritdoc />
     public void Configure(EntityTypeBuilder<SmsConfiguration> builder)
     {
         builder.HasKey(s => s.Id);

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/NotificationRepository.cs

@@ -104,6 +104,13 @@ public class NotificationRepository : INotificationRepository
     public Task UpdateSmsConfigurationAsync(SmsConfiguration smsConfiguration, CancellationToken cancellationToken = default)
     { _context.Set<SmsConfiguration>().Update(smsConfiguration); return Task.CompletedTask; }
 
+    /// <inheritdoc />
+    public async Task DeleteSmsConfigurationAsync(int id, CancellationToken cancellationToken = default)
+    {
+        var entity = await _context.Set<SmsConfiguration>().FindAsync(new object[] { id }, cancellationToken);
+        if (entity != null) _context.Set<SmsConfiguration>().Remove(entity);
+    }
+
     /// <inheritdoc />
     public async Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
         => await _context.SaveChangesAsync(cancellationToken);