Move domain models into domain package with schemas and validate with zod + elysia. Some maintenence as well

apps/portal/package.json

@@ -2,7 +2,7 @@
     "name": "@blade-and-brawn/portal",
     "type": "module",
     "devDependencies": {
-        "@sveltejs/kit": "^2.65.1",
+        "@sveltejs/kit": "^2.66.0",
         "@sveltejs/vite-plugin-svelte": "^6.2.4",
         "@types/bun": "^1.3.14",
         "svelte": "^5.56.3",
@@ -22,9 +22,9 @@
     "dependencies": {
         "@tailwindcss/vite": "^4.3.1",
         "daisyui": "^5.5.23",
-        "memoirist": "^0.4.0",
         "tailwindcss": "^4.3.1",
         "@blade-and-brawn/calculator": "workspace:*",
-        "@blade-and-brawn/commerce": "workspace:*"
+        "@blade-and-brawn/commerce": "workspace:*",
+        "@blade-and-brawn/domain": "workspace:*"
     }
 }