feat: 语音确认、联调与运维增强

- 语音：序数解析（第一个/第二个等）、解析失败计数与 API detail.retry_remaining；
  百度 ASR 固定 dev_pid 为普通话；SurgeryPipelineError 支持 extra 并入 HTTP detail。
- Demo：demo 路由与假 RTSP、客户端 index 与 README；BackendResolver 与配置调整。
- 可观测：消耗 TSV 日志、语音文件日志、终端 Markdown 辅助；相关测试与依赖更新。
- 注意：.env 仍被 gitignore，本地密钥不会进入本提交。

Made-with: Cursor

tests/test_voice_audit_repository.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 import json
 
 import pytest
@@ -55,3 +56,50 @@ async def test_save_audit_persists_fields(db_session: AsyncSession) -> None:
     assert r.resolved_label == "纱布"
     assert r.options_snapshot_json == opts
     assert r.error_message is None
+
+
+@pytest.mark.asyncio
+async def test_list_by_surgery_order_and_total(db_session: AsyncSession) -> None:
+    repo = VoiceAuditRepository()
+    async with db_session.begin():
+        await repo.save_audit(
+            db_session,
+            surgery_id="111111",
+            confirmation_id="a",
+            status="parse_failed",
+            audio_object_key=None,
+            audio_content_type=None,
+            audio_size_bytes=None,
+            audio_sha256=None,
+            asr_text="糊",
+            resolved_label=None,
+            options_snapshot_json="[]",
+            error_message="x",
+        )
+    await asyncio.sleep(0.02)
+    async with db_session.begin():
+        await repo.save_audit(
+            db_session,
+            surgery_id="111111",
+            confirmation_id="b",
+            status="recognized",
+            audio_object_key="k.wav",
+            audio_content_type="audio/wav",
+            audio_size_bytes=10,
+            audio_sha256="b" * 64,
+            asr_text="纱布",
+            resolved_label="纱布",
+            options_snapshot_json="[]",
+            error_message=None,
+        )
+    async with db_session.begin():
+        rows, total = await repo.list_by_surgery(db_session, "111111", limit=10, offset=0)
+    assert total == 2
+    assert [r.confirmation_id for r in rows] == ["b", "a"]
+    async with db_session.begin():
+        page2, total2 = await repo.list_by_surgery(
+            db_session, "111111", limit=1, offset=1
+        )
+    assert total2 == 2
+    assert len(page2) == 1
+    assert page2[0].confirmation_id == "a"