Complete v1 secret versioning and project secret snapshots

backend/src/models/secretVersion.ts

@@ -0,0 +1,75 @@
+import { Schema, model, Types } from 'mongoose';
+
+export interface ISecretVersion {
+    _id: Types.ObjectId;
+    secret: Types.ObjectId;
+    version: number;
+    isDeleted: boolean;
+    secretKeyCiphertext: string;
+	secretKeyIV: string;
+	secretKeyTag: string;
+	secretKeyHash: string;
+	secretValueCiphertext: string;
+	secretValueIV: string;
+	secretValueTag: string;
+	secretValueHash: string;
+}
+
+const secretVersionSchema = new Schema<ISecretVersion>(
+    {
+        secret: { // could be deleted
+            type: Schema.Types.ObjectId,
+            ref: 'Secret',
+            required: true
+        },
+        version: {
+            type: Number,
+            default: 1,
+            required: true
+        },
+        isDeleted: {
+            type: Boolean,
+            default: false,
+            required: true
+        },
+        secretKeyCiphertext: {
+			type: String,
+			required: true
+		},
+		secretKeyIV: {
+			type: String, // symmetric
+			required: true
+		},
+		secretKeyTag: {
+			type: String, // symmetric
+			required: true
+		},
+		secretKeyHash: {
+			type: String,
+			required: true
+		},
+		secretValueCiphertext: {
+			type: String,
+			required: true
+		},
+		secretValueIV: {
+			type: String, // symmetric
+			required: true
+		},
+		secretValueTag: {
+			type: String, // symmetric
+			required: true
+		},
+		secretValueHash: {
+			type: String,
+			required: true
+		}
+    },
+    {
+        timestamps: true
+    }
+);
+
+const SecretVersion = model<ISecretVersion>('SecretVersion', secretVersionSchema);
+
+export default SecretVersion;