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

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

packages/services/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "@barev/services",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "scripts": {
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@barev/core": "workspace:*",
+    "@barev/db": "workspace:*"
+  },
+  "devDependencies": {
+    "dotenv": "^17.0.0",
+    "vitest": "^4.1.0",
+    "pg": "^8.16.0",
+    "@types/pg": "^8.15.0"
+  }
+}