feat(transport): register AddTransport() on central nodes

src/ScadaLink.Host/Program.cs

@@ -19,6 +19,7 @@ using ScadaLink.NotificationService;
 using ScadaLink.Security;
 using ScadaLink.SiteCallAudit;
 using ScadaLink.TemplateEngine;
+using ScadaLink.Transport;
 using Serilog;
 
 // SCADALINK_CONFIG determines which role-specific config to load (Central or Site)
@@ -80,6 +81,10 @@ try
         // AddNotificationService() SMTP machinery above. AddNotificationOutbox binds
         // NotificationOutboxOptions via BindConfiguration, so no explicit Configure is needed.
         builder.Services.AddNotificationOutbox();
+        // Transport (#24) — central-only bundle export/import pipeline. Binds
+        // TransportOptions from ScadaLink:Transport via BindConfiguration; no
+        // explicit Configure needed.
+        builder.Services.AddTransport();
         // Audit Log (#23) — central node owns the AuditLogIngestActor singleton +
         // IAuditLogRepository. The site writer chain is still registered (lazy
         // singletons) but is never resolved on a central node.

src/ScadaLink.Host/ScadaLink.Host.csproj

@@ -42,6 +42,7 @@
     <ProjectReference Include="../ScadaLink.ExternalSystemGateway/ScadaLink.ExternalSystemGateway.csproj" />
     <ProjectReference Include="../ScadaLink.NotificationService/ScadaLink.NotificationService.csproj" />
     <ProjectReference Include="../ScadaLink.NotificationOutbox/ScadaLink.NotificationOutbox.csproj" />
+    <ProjectReference Include="../ScadaLink.Transport/ScadaLink.Transport.csproj" />
     <ProjectReference Include="../ScadaLink.AuditLog/ScadaLink.AuditLog.csproj" />
     <ProjectReference Include="../ScadaLink.SiteCallAudit/ScadaLink.SiteCallAudit.csproj" />
     <ProjectReference Include="../ScadaLink.CentralUI/ScadaLink.CentralUI.csproj" />

src/ScadaLink.Host/appsettings.Central.json

@@ -60,6 +60,14 @@
       "PurgeInterval": "1.00:00:00",
       "DeliveredKpiWindow": "00:01:00"
     },
+    "Transport": {
+      "BundleSessionTtlMinutes": 30,
+      "MaxBundleSizeMb": 100,
+      "MaxUnlockAttemptsPerSession": 3,
+      "MaxUnlockAttemptsPerIpPerHour": 10,
+      "Pbkdf2Iterations": 600000,
+      "SchemaVersionMajor": 1
+    },
     "Logging": {
       "MinimumLevel": "Information"
     }