chore: modified server schema version (#28358)

## Description
> fixes xml parser

Fixes: https://github.com/appsmithorg/appsmith/issues/28364

app/server/appsmith-server/src/main/java/com/appsmith/server/jslibs/imports/CustomJSLibImportableServiceCEImpl.java

@@ -1,6 +1,5 @@
 package com.appsmith.server.jslibs.imports;
 
-import com.appsmith.server.constants.ApplicationConstants;
 import com.appsmith.server.domains.Application;
 import com.appsmith.server.domains.CustomJSLib;
 import com.appsmith.server.domains.Workspace;
@@ -37,8 +36,6 @@ public class CustomJSLibImportableServiceCEImpl implements ImportableServiceCE<C
             customJSLibs = new ArrayList<>();
         }
 
-        ensureXmlParserPresenceInCustomJsLibList(customJSLibs);
-
         return Flux.fromIterable(customJSLibs)
                 .flatMap(customJSLib -> {
                     customJSLib.setId(null);
@@ -56,30 +53,4 @@ public class CustomJSLibImportableServiceCEImpl implements ImportableServiceCE<C
                     return Mono.error(e);
                 });
     }
-
-    /**
-     * This method takes customJSLibList from application JSON, checks if an entry for XML parser exists,
-     * otherwise adds the entry.
-     * This has been done to add the xmlParser entry in imported application as appsmith is stopping native support
-     * for xml parser.
-     * Read More: https://github.com/appsmithorg/appsmith/pull/28012
-     *
-     * @param customJSLibList
-     */
-    private void ensureXmlParserPresenceInCustomJsLibList(List<CustomJSLib> customJSLibList) {
-        boolean isXmlParserLibFound = false;
-        for (CustomJSLib customJSLib : customJSLibList) {
-            if (!customJSLib.getUidString().equals(ApplicationConstants.XML_PARSER_LIBRARY_UID)) {
-                continue;
-            }
-
-            isXmlParserLibFound = true;
-            break;
-        }
-
-        if (!isXmlParserLibFound) {
-            CustomJSLib xmlParserJsLib = ApplicationConstants.getDefaultParserCustomJsLibCompatibilityDTO();
-            customJSLibList.add(xmlParserJsLib);
-        }
-    }
 }

app/server/appsmith-server/src/main/java/com/appsmith/server/migrations/JsonSchemaMigration.java

@@ -66,6 +66,9 @@ public class JsonSchemaMigration {
             case 5:
                 MigrationHelperMethods.migrateGoogleSheetsActionsToUqi(applicationJson);
                 applicationJson.setServerSchemaVersion(6);
+            case 6:
+                MigrationHelperMethods.ensureXmlParserPresenceInCustomJsLibList(applicationJson);
+                applicationJson.setServerSchemaVersion(7);
             default:
                 // Unable to detect the serverSchema
         }

app/server/appsmith-server/src/main/java/com/appsmith/server/migrations/JsonSchemaVersions.java

@@ -12,6 +12,6 @@ import lombok.Getter;
  */
 @Getter
 public class JsonSchemaVersions {
-    public static final Integer serverVersion = 6;
+    public static final Integer serverVersion = 7;
     public static final Integer clientVersion = 1;
 }

app/server/appsmith-server/src/main/java/com/appsmith/server/migrations/MigrationHelperMethods.java

@@ -3,9 +3,11 @@ package com.appsmith.server.migrations;
 import com.appsmith.external.models.ActionDTO;
 import com.appsmith.external.models.BaseDomain;
 import com.appsmith.external.models.InvisibleActionFields;
+import com.appsmith.server.constants.ApplicationConstants;
 import com.appsmith.server.constants.FieldName;
 import com.appsmith.server.constants.ResourceModes;
 import com.appsmith.server.domains.ApplicationPage;
+import com.appsmith.server.domains.CustomJSLib;
 import com.appsmith.server.domains.NewAction;
 import com.appsmith.server.domains.Plugin;
 import com.appsmith.server.domains.QUser;
@@ -256,4 +258,37 @@ public class MigrationHelperMethods {
                                         where(FieldName.DELETED_AT).exists(false),
                                         where(FieldName.DELETED_AT).is(null)));
     }
+
+    /**
+     * This method takes customJSLibList from application JSON, checks if an entry for XML parser exists,
+     * otherwise adds the entry.
+     * This has been done to add the xmlParser entry in imported application as appsmith is stopping native support
+     * for xml parser.
+     * Read More: https://github.com/appsmithorg/appsmith/pull/28012
+     *
+     * @param applicationJson
+     */
+    public static void ensureXmlParserPresenceInCustomJsLibList(ApplicationJson applicationJson) {
+
+        if (CollectionUtils.isNullOrEmpty(applicationJson.getCustomJSLibList())) {
+            applicationJson.setCustomJSLibList(new ArrayList<>());
+        }
+
+        List<CustomJSLib> customJSLibList = applicationJson.getCustomJSLibList();
+        boolean isXmlParserLibFound = false;
+
+        for (CustomJSLib customJSLib : customJSLibList) {
+            if (!customJSLib.getUidString().equals(ApplicationConstants.XML_PARSER_LIBRARY_UID)) {
+                continue;
+            }
+
+            isXmlParserLibFound = true;
+            break;
+        }
+
+        if (!isXmlParserLibFound) {
+            CustomJSLib xmlParserJsLib = ApplicationConstants.getDefaultParserCustomJsLibCompatibilityDTO();
+            customJSLibList.add(xmlParserJsLib);
+        }
+    }
 }