introduced first_id to reference new template versions to original

src/models/condition_template.ts

@@ -1,6 +1,7 @@
 import mongoose from 'mongoose';
 
 const ConditionTemplateSchema = new mongoose.Schema({
+  first_id: mongoose.Schema.Types.ObjectId,
   name: String,
   version: Number,
   parameters: [{

src/models/measurement_template.ts

@@ -1,6 +1,7 @@
 import mongoose from 'mongoose';
 
 const MeasurementTemplateSchema = new mongoose.Schema({
+  first_id: mongoose.Schema.Types.ObjectId,
   name: String,
   version: Number,
   parameters: [{