Implemented a first and basic version of a Rete rule engine

src/core/sheerka/services/SheerkaMemory.py

@@ -20,7 +20,7 @@ class SheerkaMemory(BaseService):
     OBJECTS_ENTRY = "Memory:Objects"
 
     def __init__(self, sheerka):
-        super().__init__(sheerka)
+        super().__init__(sheerka, order=13)
         self.short_term_objects = FastCache()
         self.registration = {}
 
@@ -39,6 +39,8 @@ class SheerkaMemory(BaseService):
 
         cache = ListIfNeededCache().auto_configure(self.OBJECTS_ENTRY)
         self.sheerka.om.register_cache(self.OBJECTS_ENTRY, cache, persist=True, use_ref=True)
+        
+        self.sheerka.subscribe(EVENT_CONTEXT_DISPOSED, self.remove_context)
 
     def reset(self):
         self.short_term_objects.clear()
@@ -48,9 +50,6 @@ class SheerkaMemory(BaseService):
         self.short_term_objects.clear()
         self.registration.clear()
 
-    def initialize_deferred(self, context, is_first_time):
-        self.sheerka.subscribe(EVENT_CONTEXT_DISPOSED, self.remove_context)
-
     def get_from_short_term_memory(self, context, key):
         while True:
             try: