refactor(opensearch): Add Error Handling for Empty Query and Filters in Request (#5432)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/analytics/src/search.rs

@@ -16,6 +16,17 @@ pub async fn msearch_results(
     merchant_id: &common_utils::id_type::MerchantId,
     indexes: Vec<SearchIndex>,
 ) -> CustomResult<Vec<GetSearchResponse>, OpenSearchError> {
+    if req.query.trim().is_empty()
+        && req
+            .filters
+            .as_ref()
+            .map_or(true, |filters| filters.is_all_none())
+    {
+        return Err(OpenSearchError::BadRequestError(
+            "Both query and filters are empty".to_string(),
+        )
+        .into());
+    }
     let mut query_builder =
         OpenSearchQueryBuilder::new(OpenSearchQuery::Msearch(indexes.clone()), req.query);