[ISSUE #10400] Cache Version.values() in MQVersion to avoid repeated array allocation (#10401)

Co-authored-by: Qoder CLI <noreply@github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

common/src/main/java/org/apache/rocketmq/common/MQVersion.java

@@ -20,22 +20,24 @@ public class MQVersion {
 
     public static final int CURRENT_VERSION = Version.V5_5_0.ordinal();
 
+    private static final Version[] VERSION_VALUES = Version.values();
+
     public static String getVersionDesc(int value) {
-        int length = Version.values().length;
+        Version[] versions = VERSION_VALUES;
+        int length = versions.length;
         if (value >= length) {
-            return Version.values()[length - 1].name();
+            return versions[length - 1].name();
         }
-
-        return Version.values()[value].name();
+        return versions[value].name();
     }
 
     public static Version value2Version(int value) {
-        int length = Version.values().length;
+        Version[] versions = VERSION_VALUES;
+        int length = versions.length;
         if (value >= length) {
-            return Version.values()[length - 1];
+            return versions[length - 1];
         }
-
-        return Version.values()[value];
+        return versions[value];
     }
 
     public enum Version {