fix(spring-jakarta): Initialize Sentry in SentryProducerInterceptorTest

TransactionContext constructor requires ScopesAdapter.getOptions() to
be non-null for thread checker access. Add initForTest/close to
ensure Sentry is properly initialized during tests.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: adinauer

sentry-spring-jakarta/src/test/kotlin/io/sentry/spring/jakarta/kafka/SentryProducerInterceptorTest.kt

@@ -1,11 +1,14 @@
 package io.sentry.spring.jakarta.kafka
 
 import io.sentry.IScopes
+import io.sentry.Sentry
 import io.sentry.SentryOptions
 import io.sentry.SentryTraceHeader
 import io.sentry.SentryTracer
 import io.sentry.TransactionContext
+import io.sentry.test.initForTest
 import java.nio.charset.StandardCharsets
+import kotlin.test.AfterTest
 import kotlin.test.BeforeTest
 import kotlin.test.Test
 import kotlin.test.assertEquals
@@ -25,6 +28,7 @@ class SentryProducerInterceptorTest {
 
   @BeforeTest
   fun setup() {
+    initForTest { it.dsn = "https://key@sentry.io/proj" }
     scopes = mock()
     options =
       SentryOptions().apply {
@@ -34,6 +38,11 @@ class SentryProducerInterceptorTest {
     whenever(scopes.options).thenReturn(options)
   }
 
+  @AfterTest
+  fun teardown() {
+    Sentry.close()
+  }
+
   private fun createTransaction(): SentryTracer {
     val tx = SentryTracer(TransactionContext("tx", "op"), scopes)
     whenever(scopes.span).thenReturn(tx)