Remove remaining mongodb references

- Replace ObjectId import with string type in approval.workflow.ts
- Delete mongodb.d.ts type declaration file

Made-with: Cursor

GOOGLE_CLOUD_ENCOACH_ANALYSIS_CHAT.md

@@ -0,0 +1,8 @@
+# Google Cloud EnCoach Analysis
+
+Open this Cursor transcript using the chat UUID:
+
+- [Google Cloud EnCoach Analysis](9c3d1115-4845-4980-a0d5-33767025c260)
+
+Notes:
+- This is the transcript where `talal@encoach.com` was used for the Google Cloud EnCoach infrastructure analysis.

src/interfaces/approval.workflow.ts

@@ -1,9 +1,8 @@
-import { ObjectId } from "mongodb";
 import { Module } from ".";
 import { Type, User, userTypeLabels, userTypeLabelsShort } from "./user";
 
 export interface ApprovalWorkflow {
-    _id?: ObjectId,
+    _id?: string,
     name: string,
     entityId: string,
     requester: User["id"],

src/mongodb.d.ts

@@ -1,5 +0,0 @@
-import {MongoClient} from "mongodb";
-
-declare global {
-	var _mongoClientPromise: Promise<MongoClient>;
-}