Add executor leak regression test to ReplayIntegrationTest

Uses real ScheduledThreadPoolExecutor threads so the test actually
fails if the shutdown in close() is removed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: romtsn

sentry-android-replay/src/test/java/io/sentry/android/replay/ReplayIntegrationTest.kt

@@ -1110,6 +1110,27 @@ class ReplayIntegrationTest {
     assertEquals(traceId, traceIdRegistered)
   }
 
+  @Test
+  fun `close shuts down persisting executor so no SentryReplayPersister threads leak`() {
+    fixture.options.cacheDirPath = tmpDir.newFolder().absolutePath
+
+    repeat(3) {
+      val replay = fixture.getSut(context)
+      replay.register(fixture.scopes, fixture.options)
+      replay.start()
+      replay.close()
+    }
+
+    Thread.sleep(200)
+
+    val leakedThreads =
+      Thread.getAllStackTraces().keys.filter { it.name.startsWith("SentryReplayPersister-") }
+    assertTrue(
+      leakedThreads.isEmpty(),
+      "Expected no SentryReplayPersister threads after close(), found: ${leakedThreads.map { it.name }}",
+    )
+  }
+
   private fun getSessionCaptureStrategy(options: SentryOptions): SessionCaptureStrategy =
     SessionCaptureStrategy(
       options,