Fixed namespacify logic, reverted to nightly build

Signed-off-by: Aaron Chong <aaronchongth@gmail.com>

.github/workflows/nightly.yaml

@@ -1,11 +1,9 @@
 name: nightly
 
-# on:
-#   schedule:
-#     # 2am SGT
-#     - cron: '0 18 * * *'
-
-on: [push]
+on:
+  schedule:
+    # 2am SGT
+    - cron: '0 18 * * *'
 
 jobs:
   build-minimal-nav2-docker-images:

free_fleet/free_fleet/utils.py

@@ -29,8 +29,7 @@ def namespacify(base_name: str, namespace: str, delimiter: str = '/') -> str:
     If no namespace is provided, returns the base_name. Otherwise, naively
     prefixes the base_name with namespace and delimiter, returning the result.
     """
-    return f'{namespace}{delimiter}{base_name}' if not namespace \
-        else base_name
+    return base_name if not namespace else f'{namespace}{delimiter}{base_name}'
 
 
 def make_nav2_cancel_all_goals_request() -> ActionMsgs_CancelGoal_Request: