Fixed EF misconfiguration

Author: mitch-b

src/MaintenanceLog.Data/Entities/TaskDefinitionStep.cs

@@ -9,6 +9,6 @@ public class TaskDefinitionStep : BaseEntity
 
     public bool? IsOptional { get; set; }
 
-    public int TaskDefinitionId { get; set; }
+    public int? TaskDefinitionId { get; set; }
     public TaskDefinition? TaskDefinition { get; set; }
 }

src/MaintenanceLog.Data/Entities/TaskInstanceStep.cs

@@ -5,9 +5,9 @@ public class TaskInstanceStep : BaseEntity
     public DateTimeOffset? CompletedOn { get; set; }
     public ApplicationUser? CompletedBy { get; set; }
 
-    public int TaskInstanceId { get; set; }
+    public int? TaskInstanceId { get; set; }
     public TaskInstance? TaskInstance { get; set; }
 
-    public int TaskDefinitionStepId { get; set; }
+    public int? TaskDefinitionStepId { get; set; }
     public TaskDefinitionStep? TaskDefinitionStep { get; set; }
 }