Add initial entity and migration for MissionLaunch

src/MissionControl.Domain/Entities/Mission.cs

@@ -11,4 +11,6 @@ public class Mission
     public MissionStatus Status { get; set; } = MissionStatus.Planned;
 
     public DateTimeOffset CreatedAt { get; init; } = DateTimeOffset.UtcNow;
+
+    public MissionLaunch? MissionLaunch { get; set; }
 }

src/MissionControl.Domain/Entities/MissionLaunch.cs

@@ -0,0 +1,16 @@
+namespace MissionControl.Domain.Entities;
+
+public class MissionLaunch
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    public DateTimeOffset ScheduledFor { get; set; }
+
+    public MissionLaunchStatus Status { get; set; }
+
+    public DateTimeOffset CreatedAt { get; init; } = DateTimeOffset.UtcNow;
+
+    public Guid MissionId { get; set; }
+
+    public Mission Mission { get; set; } = null!;
+}

src/MissionControl.Domain/Entities/MissionLaunchStatus.cs

@@ -0,0 +1,10 @@
+namespace MissionControl.Domain.Entities;
+
+public enum MissionLaunchStatus
+{
+    Pending,
+    Delayed,
+    Launching,
+    Launched,
+    Cancelled,
+}