feat: --retry-uncertain re-diagnoses uncertain rows; fix docstring

adapters/baseline_diagnosis_store.py

@@ -106,21 +106,31 @@ class SqliteDiagnosisSignalStore:
         )
         self._conn.commit()
 
-    def done_question_ids(self, baseline_run_id: str, diag_fingerprint: str) -> set[str]:
+    def done_question_ids(
+        self,
+        baseline_run_id: str,
+        diag_fingerprint: str,
+        *,
+        retry_uncertain: bool = False,
+    ) -> set[str]:
         """查询指定 run 与诊断指纹下已完成的 question_id 集合。
 
         参数:
             baseline_run_id: baseline run 标识。
             diag_fingerprint: 诊断口径指纹。
+            retry_uncertain: True 时追加 `AND tier != 'uncertain'`，把 uncertain
+                （信号不可信降级）题排除出已完成集，令其被重新诊断；默认 False。
 
         返回:
             已落盘信号的 question_id 集合；无匹配时为空集，供断点续跑跳过。
         """
-        cursor = self._conn.execute(
+        sql = (
             "SELECT DISTINCT question_id FROM baseline_diagnosis"
-            " WHERE baseline_run_id = ? AND diag_fingerprint = ?",
-            (baseline_run_id, diag_fingerprint),
+            " WHERE baseline_run_id = ? AND diag_fingerprint = ?"
         )
+        if retry_uncertain:
+            sql += " AND tier != 'uncertain'"
+        cursor = self._conn.execute(sql, (baseline_run_id, diag_fingerprint))
         return {r["question_id"] for r in cursor.fetchall()}
 
     def load(self, baseline_run_id: str, diag_fingerprint: str) -> list[DiagnosisSignalRow]: