fix: backport fixes from a sister project

ythdd.py

@@ -53,6 +53,9 @@ def setup():
 		sanity_string += f"          If you're running a reverse proxy, set {colors.OKCYAN}is_proxied{colors.ENDC} to true to silence this message.\n"
 		print(sanity_string)
 
+	# Should work around disconnects: https://stackoverflow.com/a/61739721
+	app.config['SQLALCHEMY_ENGINE_OPTIONS'] = {"pool_pre_ping": True}
+
 	app.config['SQLALCHEMY_DATABASE_URI'] = f"sqlite:///{config['general']['db_file_path']}"
 	app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 	app.add_url_rule('/', view_func=views.index)