HF RL Explorer

Improve node refresh error handling, protective cache behavior, and subscription routing.

Improve node refresh error handling, protective cache behavior, and subscription routing.: a task in LegoFlow-SWE (Harbor dataset). Problem: When refreshing node counts for a subscription, HTTP errors from upstream (e.g., 400 Bad Request, 403 Forbidden) are swallowed and treated as successful…

The task

**Problem:** When refreshing node counts for a subscription, HTTP errors from upstream (e.g., 400 Bad Request, 403 Forbidden) are swallowed and treated as successful responses returning zero nodes. The dashboard then shows incorrect counts and user info, and the stale cached data is lost even if the subscription has…

Part of Lego-X/LegoFlow-SWE.