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

src/main.py

@@ -8,6 +8,7 @@ from send_notification import send_notification
 from metrics_server import REQUEST_COUNTER
 import asyncio
 from uvicorn_logger_config import LOGGING_CONFIG
+from secret_manager import cleanup_secret_files
 
 logger = setup_logger(__name__)
 
@@ -22,6 +23,13 @@ async def lifespan(app: FastAPI):
 	start_healthcheck_thread()
 	logger.info("[DB] MySQL healthcheck thread started.")
 
+	SECRET_PATHS = frozenset({
+		"/etc/secrets/api_key",
+		"/etc/secrets/db_username",
+		"/etc/secrets/db_password"
+	})
+	cleanup_secret_files(SECRET_PATHS)
+
 	yield
 	logger.info("[App] Closing MySQL connection pool...")
 	close_connection_pool()