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/routers/ingest.py

@@ -5,6 +5,7 @@ from pathlib import Path
 
 from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, Request, Response
 
+from app.db import save_health_snapshot, save_measure_snapshot
 from app.deps import require_ingest_auth
 from app.services import action as action_svc
 from app.services import measure as measure_svc
@@ -27,14 +28,18 @@ async def _measure_job_serial(svo_path: Path, settings: Settings) -> None:
             snap = await asyncio.to_thread(
                 measure_svc.run_full_measure, svo_path, settings
             )
-            app_state.last_measure = snap
+            save_measure_snapshot(settings, snap, source_path=str(svo_path.resolve()))
             app_state.measure_status = "idle"
         except Exception as e:
-            app_state.last_measure = MeasureSnapshot(
-                result=[],
-                video_left="",
-                video_right="",
-                error=str(e),
+            save_measure_snapshot(
+                settings,
+                MeasureSnapshot(
+                    result=[],
+                    video_left="",
+                    video_right="",
+                    error=str(e),
+                ),
+                source_path=str(svo_path.resolve()),
             )
             app_state.measure_status = "error"
 
@@ -46,13 +51,17 @@ async def _action_job_serial(mp4_path: Path, settings: Settings) -> None:
             snap = await asyncio.to_thread(
                 action_svc.run_full_action, mp4_path, settings
             )
-            app_state.last_health = snap
+            save_health_snapshot(settings, snap, source_path=str(mp4_path.resolve()))
             app_state.action_status = "idle"
         except Exception as e:
-            app_state.last_health = HealthSnapshot(
-                behavior_result="",
-                health_result="",
-                error=str(e),
+            save_health_snapshot(
+                settings,
+                HealthSnapshot(
+                    behavior_result="",
+                    health_result="",
+                    error=str(e),
+                ),
+                source_path=str(mp4_path.resolve()),
             )
             app_state.action_status = "error"