cli to control zed camera start and stop. 2. measure now use every svo2 file for 1 fish, give intermideate result and final result with confidecne level(*).

fish_api/app/services/water_video.py

@@ -12,10 +12,12 @@ from __future__ import annotations
 import asyncio
 import shutil
 from pathlib import Path
-from typing import Dict, List
+from typing import Dict, List, Optional
 
 from loguru import logger
 
+from app.compat import to_thread
+
 from app.services.action_watch import iter_mp4
 from app.services.measure import transcode_src_to_h264_dst
 from app.services.video_slice import get_video_duration, slice_video
@@ -60,7 +62,7 @@ _global_slice_urls: List[str] = []
 _last_source_mtime: float = 0.0
 
 
-def resolve_water_video_source(settings: Settings) -> Path | None:
+def resolve_water_video_source(settings: Settings) -> Optional[Path]:
     """优先 BIOMASS_WATER_VIDEO_SOURCE；否则取 ACTION_WATCH_DIR 中 mtime 最新的 .mp4。"""
     cfg = settings.biomass_water_video_source
     if cfg is not None:
@@ -103,13 +105,13 @@ async def _publish_video(
     tmp.unlink(missing_ok=True)
 
     try:
-        ok = await asyncio.to_thread(transcode_src_to_h264_dst, src, tmp)
+        ok = await to_thread(transcode_src_to_h264_dst, src, tmp)
         if ok and tmp.is_file() and tmp.stat().st_size > 0:
             tmp.replace(dst)
             logger.info("[water-video] published H.264: {} -> {}", src.name, dst.name)
         else:
             tmp.unlink(missing_ok=True)
-            await asyncio.to_thread(shutil.copy2, src, dst)
+            await to_thread(shutil.copy2, src, dst)
             logger.warning(
                 "[water-video] transcode failed, copied raw: {} -> {}",
                 src.name,