Begin refactoring backfilling and preparation operations into setup and start adding encryption metadata to models

backend/src/models/bot.ts

@@ -1,4 +1,10 @@
 import { Schema, model, Types } from 'mongoose';
+import { 
+    ALGORITHM_AES_256_GCM,
+    ENCODING_SCHEME_UTF8,
+    ENCODING_SCHEME_HEX,
+    ENCODING_SCHEME_BASE64
+} from '../variables';
 
 export interface IBot {
 	_id: Types.ObjectId;
@@ -9,6 +15,9 @@ export interface IBot {
     encryptedPrivateKey: string;
     iv: string;
     tag: string;
+    algorithm: 'aes-256-gcm';
+    keySize: 256;
+    keyEncoding: 'base64' | 'utf8';
 }
 
 const botSchema = new Schema<IBot>(
@@ -45,6 +54,24 @@ const botSchema = new Schema<IBot>(
             type: String,
             required: true,
             select: false
+        },
+        algorithm: { // the encryption algorithm used
+            type: String,
+            enum: [ALGORITHM_AES_256_GCM],
+            required: true
+        },
+        keySize: { // the size of the key used in the algorithm
+            type: Number,
+            enum: [256],
+            required: true
+        },
+        keyEncoding: {
+            type: String,
+            enum: [
+                ENCODING_SCHEME_UTF8,
+                ENCODING_SCHEME_BASE64
+            ],
+            required: true
         }
 	},
 	{