move instantiation of date time immutable to use case. request gets a string

app/Plan/UseCases/CreatePlan.php

@@ -59,7 +59,7 @@ class CreatePlan
         foreach ($nodesOfText as $node) {
             $this->createScheduledNode->execute(
                 new CreateScheduledNodeRequest(
-                    date: new DateTimeImmutable(),
+                    date: '2025-01-01', // TODO: this should be cycling over some list of dates
                     planId: $plan->getId(),
                 )
             );

app/ScheduledNode/UseCases/CreateScheduledNode.php

@@ -7,6 +7,7 @@ use App\Plan\PlanRepository;
 use App\ScheduledNode\ScheduledNode;
 use App\ScheduledNode\CreateScheduledNodeDto;
 use App\ScheduledNode\ScheduledNodeRepository;
+use DateTimeImmutable;
 use DomainException;
 
 class CreateScheduledNode
@@ -39,7 +40,7 @@ class CreateScheduledNode
 
         return $this->scheduledNodeRepo->create(
             new CreateScheduledNodeDto(
-                date: $request->date,
+                date: new DateTimeImmutable($request->date),
                 plan: $plan,
             )
         );

app/ScheduledNode/UseCases/CreateScheduledNodeRequest.php

@@ -2,12 +2,10 @@
 
 namespace App\ScheduledNode\UseCases;
 
-use DateTimeImmutable;
-
 class CreateScheduledNodeRequest
 {
     public function __construct(
-        public ?DateTimeImmutable $date,
+        public ?string $date,
         public ?int $planId,
     ) {}
 }