Use 'or' fallback for Langflow flow IDs

Switch LANGFLOW_* and NUDGES_FLOW_ID settings to use os.getenv(...) or <default> instead of os.getenv(..., <default>). This makes the code fall back to the hardcoded defaults when an environment variable is set to an empty string as well as when it's unset. Updated variables: LANGFLOW_CHAT_FLOW_ID, LANGFLOW_INGEST_FLOW_ID, LANGFLOW_URL_INGEST_FLOW_ID, NUDGES_FLOW_ID.

Author: edwinjosechittilappilly

src/config/settings.py

@@ -39,14 +39,10 @@
 LANGFLOW_URL = os.getenv("LANGFLOW_URL", "http://localhost:7860")
 # Optional: public URL for browser links (e.g., http://localhost:7860)
 LANGFLOW_PUBLIC_URL = os.getenv("LANGFLOW_PUBLIC_URL")
-LANGFLOW_CHAT_FLOW_ID = os.getenv("LANGFLOW_CHAT_FLOW_ID", "1098eea1-6649-4e1d-aed1-b77249fb8dd0")
-LANGFLOW_INGEST_FLOW_ID = os.getenv(
-    "LANGFLOW_INGEST_FLOW_ID", "5488df7c-b93f-4f87-a446-b67028bc0813"
-)
-LANGFLOW_URL_INGEST_FLOW_ID = os.getenv(
-    "LANGFLOW_URL_INGEST_FLOW_ID", "72c3d17c-2dac-4a73-b48a-6518473d7830"
-)
-NUDGES_FLOW_ID = os.getenv("NUDGES_FLOW_ID", "ebc01d31-1976-46ce-a385-b0240327226c")
+LANGFLOW_CHAT_FLOW_ID = os.getenv("LANGFLOW_CHAT_FLOW_ID") or "1098eea1-6649-4e1d-aed1-b77249fb8dd0"
+LANGFLOW_INGEST_FLOW_ID = os.getenv("LANGFLOW_INGEST_FLOW_ID") or "5488df7c-b93f-4f87-a446-b67028bc0813"
+LANGFLOW_URL_INGEST_FLOW_ID = os.getenv("LANGFLOW_URL_INGEST_FLOW_ID") or "72c3d17c-2dac-4a73-b48a-6518473d7830"
+NUDGES_FLOW_ID = os.getenv("NUDGES_FLOW_ID") or "ebc01d31-1976-46ce-a385-b0240327226c"
 
 
 # Langflow superuser credentials for API key generation