refactor DB access

src/lib/server/dbService.ts

@@ -0,0 +1,3 @@
+import Database from 'better-sqlite3';
+
+export const db = new Database('./src/lib/data/tatort.db');

src/lib/server/vorgangService.ts

@@ -2,8 +2,7 @@ import { fail } from '@sveltejs/kit';
 import { BUCKET, client, CONFIGFILENAME, TOKENFILENAME } from '$lib/minio';
 import { checkIfExactDirectoryExists, getContentOfTextObject } from './s3ClientService';
 
-import Database from 'better-sqlite3';
-const db = new Database('./src/lib/data/tatort.db');
+import { db } from './dbService';
 
 /**
  * Get Vorgang and corresponend list of tatorte