feat: add database connection file for poverty API using project-level configuration

api/db_connect.php

@@ -1,26 +1,4 @@
 <?php
-// Load konfigurasi dari file .env
-require_once __DIR__ . '/env_loader.php';
-
-$host = env('DB_HOST', 'localhost');
-$port = (int) env('DB_PORT', 3306);
-$user = env('DB_USER', 'root');
-$pass = env('DB_PASS', '');
-$db   = env('DB_NAME', 'webgis_poverty');
-
-// Koneksi ke MySQL/MariaDB
-$conn = new mysqli($host, $user, $pass, $db, $port);
-
-if ($conn->connect_error) {
-    http_response_code(500);
-    die(json_encode([
-        'status'  => 'error',
-        'message' => 'Koneksi database gagal: ' . $conn->connect_error,
-    ]));
-}
-
-// Set charset
-$conn->set_charset('utf8mb4');
-
-// Jika di-include oleh file API, biarkan $conn tersedia
+// Gunakan koneksi terpusat dari root project
+require_once dirname(__DIR__, 2) . '/db_connect.php';
 ?>