add find by text id method to node repo w/ impl

app/Node/NodeRepository.php

@@ -9,4 +9,9 @@ interface NodeRepository
     public function create(CreateNodeDto $dto): Node;
 
     public function find(int $id): ?Node;
+
+    /**
+     * @return Node[]
+     */
+    public function findByTextId(int $id): array;
 }

tests/Fakes/FakeNodeRepository.php

@@ -48,4 +48,14 @@ class FakeNodeRepository implements NodeRepository
             parentNode: $node->getParentNode(),
         );
     }
+
+    public function findByTextId(int $id): array
+    {
+        return array_filter(
+            $this->existingNodes,
+            function (Node $node) use ($id) {
+                return $node->getId() === $id;
+            }
+        );
+    }
 }