添加新的provider，旧的可以删了

datasvc/app/main.py

@@ -22,10 +22,8 @@ from fastapi.middleware.cors import CORSMiddleware
 # docker compose down && docker compose build --no-cache && docker compose up -d
 # docker compose down && docker compose build && docker compose up -d
 
-try:
-    from technical.util import resample_to_interval  # type: ignore
-except ImportError:  # pragma: no cover - 环境缺失依赖时自动降级
-    resample_to_interval = None  # type: ignore
+from technical.util import resample_to_interval  # type: ignore
+
 
 from .storage import candle_path, ensure_storage, read_candles, write_candles_snapshot
 
@@ -450,7 +448,7 @@ DERIVED_TIMEFRAMES = [tf for tf in AVAILABLE_TIMEFRAMES if tf not in FETCH_TIMEF
 AGGREGATION_TARGETS = {tf: AGGREGATION_PLAN.get(tf, []) for tf in FETCH_TIMEFRAMES}
 BASE_TIMEFRAMES = set(FETCH_TIMEFRAMES)
 
-START_FROM = os.environ.get("START_FROM", "2025-09-01")  # 首次启动拉取起始日期（UTC）
+START_FROM = os.environ.get("START_FROM", "2025-01-01")  # 首次启动拉取起始日期（UTC）
 POLL_FACTOR = float(os.environ.get("POLL_FACTOR", "0.5"))  # 轮询间隔 = tf_ms * factor
 BACKOFF_BASE = float(os.environ.get("BACKOFF_BASE", "2.0"))
 BACKOFF_MAX = float(os.environ.get("BACKOFF_MAX", "30.0"))
@@ -513,7 +511,7 @@ def parse_start_from_ms(val: str) -> int:
         dt = datetime.fromisoformat(val)  # 允许 '2022-01-01' 或 '2022-01-01T00:00:00'
     except Exception:
         # 回退到固定日期
-        dt = datetime(2025, 9, 1)
+        dt = datetime(2025, 1, 1)
     return int(dt.timestamp() * 1000)