fix(backend): raw update reaches every handler that declares it, contact list follows user updates

backend/src/userbot/handlers/raw/dispatcher.py

@@ -24,8 +24,9 @@ _MODULES = (
     read_receipts,
     transcribed,
 )
-_REGISTRY: dict[type, RawHandler] = {
-    update_type: module.handle for module in _MODULES for update_type in module.HANDLES
+_REGISTRY: dict[type, list[RawHandler]] = {
+    update_type: [module.handle for module in _MODULES if update_type in module.HANDLES]
+    for update_type in {kind for module in _MODULES for kind in module.HANDLES}
 }
 
 
@@ -33,8 +34,7 @@ _REGISTRY: dict[type, RawHandler] = {
 async def dispatch(
     client: PyroClient, update: raw.base.Update, users: dict, chats: dict
 ) -> None:
-    handler = _REGISTRY.get(type(update))
-    if handler is not None:
+    for handler in _REGISTRY.get(type(update), ()):
         await handler(client, update, users, chats)