RigShare 1.4.0: unload models after an idle period (#4)

New admin option (auto_unload_minutes, off by default): once nothing has run for that many minutes, the hub sets ComfyUI's unload_models queue flag, as the Unload models button does. A run or a waiting prompt restarts the clock; it unloads once per idle period. auto_unload_cache also clears the node cache (free_memory).

Co-authored-by: Edouard Durand <xiaodoudou@users.noreply.github.com>

tests/python/helpers.py

@@ -38,10 +38,14 @@ class FakeQueue:
 
     def __init__(self):
         self.running, self.pending, self.number = [], [], 0
+        self.flags = {}
 
     def get_current_queue_volatile(self):
         return list(self.running), list(self.pending)
 
+    def set_flag(self, name, data):
+        self.flags[name] = data
+
     history = {}
 
     def get_history(self, prompt_id=None, max_items=None, offset=-1, map_function=None):