add '_' prefix to special emoji codes, fix skip rankings

backend/oasst_backend/tree_manager.py

@@ -967,7 +967,7 @@ SELECT m.parent_id, m.role, COUNT(m.id) children_count, MIN(m.ranking_count) chi
 FROM message_tree_state mts
     INNER JOIN message m ON mts.message_tree_id = m.message_tree_id
     LEFT JOIN message_emoji me on
-        (m.id = me.message_id
+        (m.parent_id = me.message_id
         AND :skip_user_id IS NOT NULL
         AND me.user_id = :skip_user_id
         AND me.emoji = :skip_ranking)

oasst-shared/oasst_shared/schemas/protocol.py

@@ -490,9 +490,9 @@ class EmojiCode(str, enum.Enum):
     skull = "skull"  # 💀
 
     # skip task system uses special emoji codes
-    skip_reply = "skip_reply"
-    skip_ranking = "skip_ranking"
-    skip_labeling = "skip_labeling"
+    skip_reply = "_skip_reply"
+    skip_ranking = "_skip_ranking"
+    skip_labeling = "_skip_labeling"
 
 
 class EmojiOp(str, enum.Enum):