data pipeline refactor and fix

.gitignore

@@ -1,6 +1,7 @@
 /backend.old/data
 /backend.old/uploads/
 chat/
+bin/create-all-users
 
 # Environment variables
 .env
@@ -114,6 +115,9 @@ deploy/k8s/prod/secrets/*.yaml
 # Dev environment image tags
 .dev-image-tag
 
+# Dev gateway-config is generated from gateway-config.yaml.tpl by bin/dev
+deploy/k8s/dev/configs/gateway-config.yaml
+
 # Protobuf copies (canonical files are in /protobuf/)
 flink/protobuf/
 relay/protobuf/