Initial commit: teaching institution management API.

Express/MongoDB backend with JWT auth, RBAC, S3 uploads, notifications, and scheduled jobs.

events/eventLogModel.js

@@ -0,0 +1,25 @@
+// /events/eventLogModel.js
+
+const mongoose = require('mongoose');
+
+const eventLogSchema = new mongoose.Schema({
+  eventName: {
+    type: String,
+    required: true,
+    index: true
+  },
+  payload: {
+    type: mongoose.Schema.Types.Mixed
+  },
+  actor: {
+    type: mongoose.Schema.Types.ObjectId,
+    ref: 'User',
+    default: null
+  },
+  createdAt: {
+    type: Date,
+    default: Date.now
+  }
+});
+
+module.exports = mongoose.model('EventLog', eventLogSchema);