Refactor runtime bootstrap and ship control flows

apps/backend/Universe/Api/SpawnStationHandler.cs

@@ -0,0 +1,25 @@
+using FastEndpoints;
+
+namespace SpaceGame.Api.Universe.Api;
+
+public sealed class SpawnStationHandler(WorldService worldService) : Endpoint<SpawnStationCommandRequest, StationSnapshot>
+{
+    public override void Configure()
+    {
+        Post("/api/gm/stations");
+        Policies(AuthPolicyNames.GmAccess);
+    }
+
+    public override async Task HandleAsync(SpawnStationCommandRequest request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            await SendOkAsync(worldService.SpawnStation(request), cancellationToken);
+        }
+        catch (InvalidOperationException ex)
+        {
+            AddError(ex.Message);
+            await SendErrorsAsync(cancellation: cancellationToken);
+        }
+    }
+}