Improve basic and advanced search logic

Closes #17, #18 , #19

__tests__/api/search/post.test.js

@@ -36,7 +36,6 @@ describe("getQueryResultsHandler", () => {
       sourcesId: [1, 2, 3],
       fieldsId: [1, 2, 3],
       index: "test_index",
-      scroll_id: "test_scroll_id",
     };
     const mockResponse = { hits: { hits: [] } };
     search.mockResolvedValue(mockResponse);
@@ -54,7 +53,6 @@ describe("getQueryResultsHandler", () => {
       sourcesId: [1, 2, 3],
       fieldsId: [1, 2, 3],
       index: "test_index",
-      scroll_id: "test_scroll_id",
     };
     search.mockImplementation(() => {
       throw error;