Monorepo skeleton, Prisma schema, core domain and services with tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

packages/db/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "@barev/db",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "exports": { ".": "./src/index.ts" },
+  "scripts": {
+    "generate": "prisma generate",
+    "migrate": "prisma migrate dev",
+    "deploy": "prisma migrate deploy",
+    "reset": "prisma migrate reset --force",
+    "seed": "tsx src/seed/index.ts",
+    "studio": "prisma studio",
+    "typecheck": "tsc --noEmit",
+    "postinstall": "prisma generate"
+  },
+  "dependencies": {
+    "@prisma/adapter-pg": "7.10.1",
+    "@prisma/client": "7.10.1",
+    "pg": "^8.16.0"
+  },
+  "devDependencies": {
+    "@barev/core": "workspace:*",
+    "@node-rs/argon2": "^2.0.2",
+    "dotenv": "^17.0.0",
+    "prisma": "7.10.1",
+    "tsx": "^4.20.0"
+  }
+}