Restore accidentally removed files, a few additional import/calculation fixes

inventory-server/dashboard/klaviyo-server/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "klaviyo-server",
+  "version": "1.0.0",
+  "description": "Klaviyo API integration server",
+  "main": "server.js",
+  "type": "module",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "nodemon server.js"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.4.7",
+    "esm": "^3.2.25",
+    "express": "^4.18.2",
+    "express-rate-limit": "^7.5.0",
+    "ioredis": "^5.4.1",
+    "luxon": "^3.5.0",
+    "node-fetch": "^3.3.2",
+    "pg": "^8.18.0",
+    "recharts": "^2.15.0"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.2"
+  }
+}