chg: [schema] Tag name should be unique

INSTALL/MYSQL.sql

@@ -1153,7 +1153,7 @@ CREATE TABLE IF NOT EXISTS `tags` (
   `hide_tag` tinyint(1) NOT NULL DEFAULT 0,
   `numerical_value` int(11) NULL,
   PRIMARY KEY (`id`),
-  INDEX `name` (`name`(255)),
+  UNIQUE INDEX `name` (`name`(255)),
   INDEX `org_id` (`org_id`),
   INDEX `user_id` (`user_id`),
   INDEX `numerical_value` (`numerical_value`)

db_schema.json

@@ -8121,7 +8121,7 @@
         },
         "tags": {
             "id": true,
-            "name": false,
+            "name": true,
             "org_id": false,
             "user_id": false,
             "numerical_value": false