fix: standardize Langfuse endpoint on LANGFUSE_BASE_URL - #351

Bugbot Analysis Progress (25s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (21s)
✅ Posted analysis results (0s)

Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_ddfc12f8-10cb-493b-9db8-9b872214a24f