added initial integration tests with bun

libs/postgres-client/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "@stock-bot/postgres-client",
+  "version": "1.0.0",
+  "description": "PostgreSQL client library for Stock Bot platform",
+  "main": "src/index.ts",
+  "type": "module",
+  "scripts": {
+    "build": "tsc",
+    "test": "bun test",
+    "lint": "eslint src/**/*.ts",
+    "type-check": "tsc --noEmit",
+    "dev": "tsc --watch"
+  },
+  "dependencies": {
+    "@stock-bot/config": "*",
+    "@stock-bot/logger": "*",
+    "@stock-bot/types": "*",
+    "pg": "^8.11.3",
+    "zod": "^3.22.4"
+  },
+  "devDependencies": {
+    "@types/node": "^20.11.0",
+    "@types/pg": "^8.10.7",
+    "typescript": "^5.3.0",
+    "eslint": "^8.56.0",
+    "@typescript-eslint/eslint-plugin": "^6.19.0",
+    "@typescript-eslint/parser": "^6.19.0",
+    "bun-types": "^1.2.15"
+  },
+  "keywords": [
+    "postgresql",
+    "database",
+    "client",
+    "stock-bot"
+  ],
+  "exports": {
+    ".": {
+      "import": "./src/index.ts",
+      "require": "./dist/index.js"
+    }
+  }
+}