fix: restore colbert/ + persist after chat

app/services/persist.py

@@ -86,7 +86,11 @@ async def restore_from_hf() -> None:
     repo_id = settings.hf_persist_repo
     token = settings.hf_token.get_secret_value()
     local_root = data_dir()
-    target_subdirs = ["chroma", "sqlite", "uploads"]
+    # ⚠️ 必须含所有可能存在的子目录, 否则 restore 漏掉 → 数据看似在 Dataset,
+    # 但 Space 重启后 /data 是空的.
+    # 历史: 早期只用 chroma/, 后改 ENALBE_COLBERT=true 用 colbert/,
+    # 但 restore 的 allow_patterns 没改, → colbert/ 永远没被 restore 回来.
+    target_subdirs = ["chroma", "colbert", "sqlite", "uploads"]
 
     loop = asyncio.get_running_loop()
     try: