Add metadata query resolvers (#1929)

* Add metadata queries resolvers

* remove hello field

* fix linter

server/src/tenant/schema-generation/graphql-types/page-info.graphql-type.ts

@@ -1,9 +1,5 @@
-import {
-  GraphQLBoolean,
-  GraphQLNonNull,
-  GraphQLObjectType,
-  GraphQLString,
-} from 'graphql';
+import { ConnectionCursorScalar } from '@ptc-org/nestjs-query-graphql';
+import { GraphQLBoolean, GraphQLNonNull, GraphQLObjectType } from 'graphql';
 
 /**
  * GraphQL PageInfo type.
@@ -11,8 +7,8 @@ import {
 export const PageInfoType = new GraphQLObjectType({
   name: 'PageInfo',
   fields: {
-    startCursor: { type: GraphQLString },
-    endCursor: { type: GraphQLString },
+    startCursor: { type: ConnectionCursorScalar },
+    endCursor: { type: ConnectionCursorScalar },
     hasNextPage: { type: new GraphQLNonNull(GraphQLBoolean) },
     hasPreviousPage: { type: new GraphQLNonNull(GraphQLBoolean) },
   },