fix(ai): restore dynamic baseline holt winters fit

apps/api/src/services/dynamic_baseline_service.py

@@ -71,7 +71,7 @@ class BaselineState:
         }
 
     @classmethod
-    def from_dict(cls, d: dict[str, Any]) -> "BaselineState":
+    def from_dict(cls, d: dict[str, Any]) -> BaselineState:
         return cls(
             metric_name=d["metric_name"],
             mean=d["mean"],
@@ -250,6 +250,7 @@ class DynamicBaselineService:
     ) -> list[MetricDatapoint]:
         """從 Prometheus query_range API 抓取歷史資料（1h 步進）。"""
         import httpx
+
         from src.core.config import settings
 
         end_ts = now_taipei().timestamp()
@@ -314,7 +315,7 @@ class DynamicBaselineService:
                 seasonal="add" if len(arr) >= seasonal_periods * 2 else None,
                 seasonal_periods=seasonal_periods,
                 initialization_method="estimated",
-            ).fit(optimized=True, disp=False)
+            ).fit(optimized=True)
 
             fitted = model.fittedvalues
             residuals = arr - fitted
@@ -447,6 +448,7 @@ class DynamicBaselineService:
         """從 PostgreSQL 載入最新一筆基線記錄"""
         try:
             from sqlalchemy import select
+
             from src.db.base import get_session_factory
             from src.db.models import DynamicBaselineRecord
 

apps/api/tests/test_dynamic_baseline_service.py

@@ -0,0 +1,9 @@
+from pathlib import Path
+
+
+def test_holt_winters_fit_does_not_use_removed_disp_argument() -> None:
+    repo_root = Path(__file__).resolve().parents[3]
+    source = (repo_root / "apps/api/src/services/dynamic_baseline_service.py").read_text()
+
+    assert ".fit(optimized=True, disp=False)" not in source
+    assert ".fit(optimized=True)" in source