Phase 8: Production readiness — failover tests, security hardening, sandboxing, deployment docs

- WP-1-3: Central/site failover + dual-node recovery tests (17 tests)
- WP-4: Performance testing framework for target scale (7 tests)
- WP-5: Security hardening (LDAPS, JWT key length, no secrets in logs) (11 tests)
- WP-6: Script sandboxing adversarial tests (28 tests, all forbidden APIs)
- WP-7: Recovery drill test scaffolds (5 tests)
- WP-8: Observability validation (structured logs, correlation IDs, metrics) (6 tests)
- WP-9: Message contract compatibility (forward/backward compat) (18 tests)
- WP-10: Deployment packaging (installation guide, production checklist, topology)
- WP-11: Operational runbooks (failover, troubleshooting, maintenance)
92 new tests, all passing. Zero warnings.

src/ScadaLink.InboundAPI/ServiceCollectionExtensions.cs

@@ -6,7 +6,10 @@ public static class ServiceCollectionExtensions
 {
     public static IServiceCollection AddInboundAPI(this IServiceCollection services)
     {
-        // Phase 0: skeleton only
+        services.AddScoped<ApiKeyValidator>();
+        services.AddSingleton<InboundScriptExecutor>();
+        services.AddScoped<RouteHelper>();
+
         return services;
     }
 }