feat: consumption log top1 + elapsed since recording; RTSP play once

- Add top1_name/top1_conf to TSV and show top1–3 in pending markdown
- Add 相对开录 column and pass since_recording_start from surgery start
- Track surgery_started_wall and format_elapsed_mmss_since in session registry
- Remove ffmpeg stream_loop from synthetic/demo fake RTSP (play once)
- Fix fake_rtsp_from_file poll loop indentation; update README
- Extend consumption TSV tests; add face test PNGs under tests/faces

Made-with: Cursor

scripts/demo_client/README.md

@@ -8,7 +8,7 @@
 scripts/demo_client/
   server.py                 # 基于 stdlib 的静态服务器；额外暴露 /labels.json
   index.html                # 单文件页面（原生 JS，零构建依赖）
-  fake_rtsp_from_file.py    # 无真摄像头时：把本地视频循环发布为 RTSP（ffmpeg + Docker MediaMTX）
+  fake_rtsp_from_file.py    # 无真摄像头时：把本地视频按文件时长推一次到 RTSP（ffmpeg + Docker MediaMTX）
 ```
 
 ## 调试：无真实摄像头，用录好的视频模拟 RTSP
@@ -53,10 +53,10 @@ python3 scripts/demo_client/fake_rtsp_from_file.py --port 18554 \
 发布失败时，可尝试把输入转码后再推流（示例，需自行调整）：
 
 ```bash
-ffmpeg -re -stream_loop -1 -i recording.mp4 -c:v libx264 -pix_fmt yuv420p -f rtsp -rtsp_transport tcp rtsp://127.0.0.1:18554/demo
+ffmpeg -re -i recording.mp4 -c:v libx264 -pix_fmt yuv420p -f rtsp -rtsp_transport tcp rtsp://127.0.0.1:18554/demo
 ```
 
-（仍须先自行启动 MediaMTX 或等价 RTSP 服务端。）
+（仍须先自行启动 MediaMTX 或等价 RTSP 服务端；上例为**播完即止**，若要循环请加 `-stream_loop -1`。）
 
 Demo 页面「调试：两路视频」中可用 **选择视频** / **拖放** 为路1/路2 指定文件，并配合下面 **一键开录** 上传，无需在页面里手抄 `python3` / `export` 命令。若必须完全手跑 `fake_rtsp_from_file.py`，请在上文命令示例与 `export VIDEO_RTSP_URLS_JSON=...` 方式自行在终端完成。
 

scripts/demo_client/fake_rtsp_from_file.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Publish local video file(s) as looping RTSP stream(s) (fake camera) for local dev.
+"""Publish local video file(s) to RTSP once per file (fake camera) for local dev.
 
 The Operation Room server only opens RTSP URLs (OpenCV); there is no video-upload API.
 This script does NOT change the application backend: it runs ffmpeg + a small
@@ -103,7 +103,7 @@ def _parse_stream_arg(spec: str) -> tuple[str, Path, str]:
 
 def main() -> int:
     parser = argparse.ArgumentParser(
-        description="Loop video file(s) to RTSP URL(s) (dev fake camera; no backend code change).",
+        description="Play each video file once to an RTSP URL (dev fake camera; no backend code change).",
     )
     parser.add_argument(
         "video",
@@ -198,7 +198,6 @@ def main() -> int:
             "ffmpeg",
             "-hide_banner", "-loglevel", "info",
             "-re",
-            "-stream_loop", "-1",
             "-i", str(fp),
             "-c", "copy",
             "-f", "rtsp",
@@ -225,7 +224,11 @@ def main() -> int:
         h = u.replace("127.0.0.1", "host.docker.internal", 1)
         print(f"  {cam}: {h}", file=sys.stderr)
     print("---", file=sys.stderr)
-    print("Fake RTSP running (Ctrl+C to stop; MediaMTX container removed on exit).", file=sys.stderr)
+    print(
+        "Fake RTSP running: each file plays once; script exits when ffmpeg ends "
+        "(Ctrl+C to stop early; MediaMTX container removed on exit).",
+        file=sys.stderr,
+    )
 
     def on_sigint(_sig: int, _frame) -> None:
         for p in procs:
@@ -240,8 +243,8 @@ def main() -> int:
     try:
         while True:
             time.sleep(0.5)
-        for p in procs:
-            if p.poll() is not None:
+            for p in procs:
+                if p.poll() is not None:
                     print(
                         f"[fake-rtsp] ffmpeg ended (code {p.returncode}), stopping all.",
                         file=sys.stderr,