Fix resource leak in IndexStoreFile shutdown

Add cleanResources() calls after shutdown() for both mappedFile and compactMappedFile to ensure proper cleanup of memory-mapped buffers and file channels.

Change-Id: I2716b4e3b0cd281e89a9d5a00a389dc6048de3e7
Co-developed-by: Cursor <noreply@cursor.com>

Author: RongtongJin

tieredstore/src/main/java/org/apache/rocketmq/tieredstore/index/IndexStoreFile.java

@@ -468,9 +468,11 @@ public void shutdown() {
             }
             if (this.mappedFile != null) {
                 this.mappedFile.shutdown(TimeUnit.SECONDS.toMillis(10));
+                this.mappedFile.cleanResources();
             }
             if (this.compactMappedFile != null) {
                 this.compactMappedFile.shutdown(TimeUnit.SECONDS.toMillis(10));
+                this.compactMappedFile.cleanResources();
             }
         } catch (Exception e) {
             log.error("IndexStoreFile shutdown failed, timestamp: {}, status: {}", this.getTimestamp(), fileStatus.get(), e);