feat(fish_api): SQLite 快照投递、日志与 watch 空闲告警

- 新增 SQLite：measure/health 快照、delivery_cursor 单消费者 pop；clear/start_fresh 可清空库
- biomass GET 仅返回约定 data 字段，X-Fish-Biomass-New 表示是否有新快照；poller 读响应头
- loguru 桥接 uvicorn，子进程 stdout 流式输出；format_json_pretty 与算法摘要日志
- measure/action watch 无新任务时限流 WARNING；watch_idle 共用逻辑
- 依赖 loguru；新增 db、logging_config、subprocess_run、watch_idle、启动脚本

FishMeasure: 更新 fish_video_weight_evaluation 与 predict_weigth_from_svo2；移除未用 refbox/segmentation 脚本
Made-with: Cursor

fish_api/app/services/action.py

@@ -2,14 +2,16 @@ from __future__ import annotations
 
 import json
 import os
-import subprocess
 import sys
 import tempfile
 from datetime import datetime, timezone
 from pathlib import Path
 
+from app.logging_config import format_json_pretty
 from app.settings import Settings
 from app.state import HealthSnapshot
+from app.subprocess_run import run_subprocess_with_log
+from loguru import logger
 
 BEHAVIOR_EN_TO_ZH = {
     "feeding": "吃饵",
@@ -67,15 +69,14 @@ def run_action_subprocess(mp4_path: Path, settings: Settings) -> str:
             "--log_interval",
             "0",
         ]
-        proc = subprocess.run(
+        proc = run_subprocess_with_log(
             cmd,
             cwd=str(settings.fish_action_root),
             env=os.environ.copy(),
-            capture_output=True,
-            text=True,
+            log_name="FishAction",
         )
         if proc.returncode != 0:
-            err = (proc.stderr or "") + (proc.stdout or "")
+            err = proc.stdout or ""
             raise RuntimeError(
                 f"predict_video_x3d_3class.py failed ({proc.returncode}): {err[-4000:]}"
             )
@@ -86,6 +87,10 @@ def run_action_subprocess(mp4_path: Path, settings: Settings) -> str:
         if not rows:
             raise RuntimeError("Empty prediction JSON")
         pred_en = str(rows[0].get("pred_3class", "")).strip().lower()
+        logger.info(
+            "[FishAction] prediction row:\n{}",
+            format_json_pretty(rows[0]),
+        )
         if pred_en not in BEHAVIOR_EN_TO_ZH:
             raise RuntimeError(f"Unexpected pred_3class: {pred_en!r}")
         return pred_en
@@ -95,9 +100,17 @@ def run_action_subprocess(mp4_path: Path, settings: Settings) -> str:
 
 
 def run_full_action(mp4_path: Path, settings: Settings) -> HealthSnapshot:
+    logger.info("[FishAction] start mp4={}", mp4_path.resolve())
     pred_en = run_action_subprocess(mp4_path, settings)
     zh = BEHAVIOR_EN_TO_ZH[pred_en]
     health = behavior_to_health(pred_en)
+    logger.info(
+        "[FishAction] done mp4={} pred_3class={} behavior_zh={} health={}",
+        mp4_path.name,
+        pred_en,
+        zh,
+        health,
+    )
     return HealthSnapshot(
         behavior_result=zh,
         health_result=health,