backend redesign

flink/secrets.example.yaml

@@ -0,0 +1,8 @@
+# Example secrets file
+# This should be mounted at /etc/secrets/secrets.yaml in the Flink container
+
+# Iceberg catalog credentials
+iceberg_catalog_username: "admin"
+iceberg_catalog_password: "changeme"
+
+# Additional secrets as needed