chore: add missing constants files

Author: himanshusinghs

src/helpers/constants.ts

@@ -0,0 +1,14 @@
+/**
+ * A cap for the maxTimeMS used for FindCursor.countDocuments.
+ *
+ * The number is relatively smaller because we expect the count documents query
+ * to be finished sooner if not by the time the batch of documents is retrieved
+ * so that count documents query don't hold the final response back.
+ */
+export const QUERY_COUNT_MAX_TIME_MS_CAP: number = 10_000;
+
+/**
+ * A cap for the maxTimeMS used for counting resulting documents of an
+ * aggregation.
+ */
+export const AGG_COUNT_MAX_TIME_MS_CAP: number = 60_000;