fix(exclusive): add upgarde API && fix description error

apps/emqx/i18n/emqx_schema_i18n.conf

@@ -757,11 +757,11 @@ mqtt 下所有的配置作为全局的默认值存在，它可以被 <code>zone<
     mqtt_exclusive_subscription {
         desc {
             en: """Whether to enable support for MQTT exclusive subscription."""
-            zh: """是否启用对 MQTT 独占订阅的支持。"""
+            zh: """是否启用对 MQTT 排它订阅的支持。"""
         }
         label: {
-            en: """Exclusive Subscription Available"""
-            zh: """独占订阅可用"""
+            en: """Exclusive Subscription"""
+            zh: """排它订阅"""
         }
     }
 

apps/emqx/src/emqx_exclusive_subscription.erl

@@ -24,6 +24,9 @@
 %% Mnesia bootstrap
 -export([mnesia/1]).
 
+%% For upgrade
+-export([on_add_module/0, on_delete_module/0]).
+
 -boot_mnesia({mnesia, [boot]}).
 -copy_mnesia({mnesia, [copy]}).
 
@@ -61,6 +64,16 @@ mnesia(boot) ->
     ]),
     ok = mria_rlog:wait_for_shards([?EXCLUSIVE_SHARD], infinity).
 
+%%--------------------------------------------------------------------
+%% Upgrade
+%%--------------------------------------------------------------------
+
+on_add_module() ->
+    mnesia(boot).
+
+on_delete_module() ->
+    mria:clear_table(?EXCLUSIVE_SHARD).
+
 %%--------------------------------------------------------------------
 %% APIs
 %%--------------------------------------------------------------------