perf: add mikro-orm cache for x3 memory usage decrease

Author: ShGKme

.gitignore

@@ -2,6 +2,9 @@
 db.sqlite3
 sessions.sqlite3
 
+# Mikro ORM temp
+/temp
+
 # compiled output
 /dist
 /node_modules

src/mikro-orm.config.ts

@@ -15,5 +15,4 @@ export default {
   autoFlush: false, // Read more here: https://mikro-orm.io/unit-of-work/
   baseDir: path.join(__dirname, '..'),
   logger: logger.log.bind(logger),
-  cache: { enabled: false },
 } as Options;