feat: Füge Typparser für PostgreSQL hinzu, um Dezimal- und Ganzzahlen korrekt zu verarbeiten

backend/src/db.ts

@@ -1,6 +1,10 @@
-import { Pool } from "pg";
+import { Pool, types } from "pg"; // "types" importieren
 import { config } from "./config";
 
+types.setTypeParser(1700, (val) => parseFloat(val));
+types.setTypeParser(20, (val) => parseInt(val, 10));
+
+
 export const pool = new Pool({
   connectionString: config.databaseUrl
 });
@@ -9,4 +13,4 @@ export const pool = new Pool({
 export async function query<T = any>(text: string, params?: any[]): Promise<T[]> {
   const res = await pool.query(text, params);
   return res.rows as T[];
-}
+}