test(spring-boot): Check the GraphQL task query's assignee and creator ids

The sample's test asserted assigneeId and creatorId, which the query
requests but the port didn't check.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: runningcode

sentry-spring-boot-jakarta/src/integrationTest/kotlin/io/sentry/spring/boot/jakarta/integrationtest/GraphqlIntegrationTest.kt

@@ -67,6 +67,8 @@ class GraphqlIntegrationTest : IntegrationTest() {
     val tasks = response["data"]["tasks"]
     assertThat(tasks.size()).isEqualTo(5)
     assertThat(tasks[0]["id"].asText()).isEqualTo("T1")
+    assertThat(tasks[0]["assigneeId"].asText()).isEqualTo("A3")
+    assertThat(tasks[0]["creatorId"].asText()).isEqualTo("C3")
     assertThat(tasks[0]["assignee"]["id"].asText()).isEqualTo("A3")
     assertThat(tasks[0]["creator"]["id"].asText()).isEqualTo("C3")