ENGCOM-5977: #24581 Added unique key on eav_attribute_label table #24682

 - Merge Pull Request #24682 from KaushikChavda/magento2:issue/24581
 - Merged commits:
   1. dbf518e
   2. 4dbf01c
   3. f5638be

Author: magento-engcom-team

app/code/Magento/Eav/etc/db_schema.xml

@@ -481,6 +481,10 @@
                     referenceColumn="attribute_id" onDelete="CASCADE"/>
         <constraint xsi:type="foreign" referenceId="EAV_ATTRIBUTE_LABEL_STORE_ID_STORE_STORE_ID" table="eav_attribute_label"
                     column="store_id" referenceTable="store" referenceColumn="store_id" onDelete="CASCADE"/>
+        <constraint xsi:type="unique" referenceId="EAV_ATTRIBUTE_LABEL_ATTRIBUTE_ID_STORE_ID_UNIQUE">
+            <column name="store_id"/>
+            <column name="attribute_id"/>
+        </constraint>
         <index referenceId="EAV_ATTRIBUTE_LABEL_STORE_ID" indexType="btree">
             <column name="store_id"/>
         </index>

app/code/Magento/Eav/etc/db_schema_whitelist.json

@@ -304,7 +304,8 @@
         "constraint": {
             "PRIMARY": true,
             "EAV_ATTRIBUTE_LABEL_ATTRIBUTE_ID_EAV_ATTRIBUTE_ATTRIBUTE_ID": true,
-            "EAV_ATTRIBUTE_LABEL_STORE_ID_STORE_STORE_ID": true
+            "EAV_ATTRIBUTE_LABEL_STORE_ID_STORE_STORE_ID": true,
+            "EAV_ATTRIBUTE_LABEL_STORE_ID_ATTRIBUTE_ID": true
         }
     },
     "eav_form_type": {