Added lib-secret-manager which consumes secrets after application launch

requirements.txt

@@ -7,6 +7,7 @@ fastapi==0.118.2
 feedparser==6.0.12
 h11==0.16.0
 idna==3.10
+lib-secret-manager @ git+https://git.gansejunge.com/notifier/lib-secret-manager.git@main
 lib-uvicorn-config @ git+https://git.gansejunge.com/notifier/lib-uvicorn-config.git@main
 mysql-connector-python==9.4.0
 prometheus_client==0.23.1