feat: surgery pipeline API, video inference, voice confirm, and tests

- Add FastAPI routes for surgery start/end, results, pending confirmation (WAV upload), and health checks.
- Implement RTSP/Hikvision capture, consumable classification, session manager, MinIO/Baidu voice resolution, and DB persistence.
- Add documentation (client API, video backends, staging checklist) and sample camera/RTSP config.
- Add pytest suite (API contract, session manager, voice, repositories, pipeline persistence) and httpx dev dependency.
- Replace deprecated HTTP_422_UNPROCESSABLE_ENTITY with HTTP_422_UNPROCESSABLE_CONTENT.
- Fix SurgeryPipeline DB reads to use an explicit transaction with autobegin disabled.

Made-with: Cursor

app/database.py

@@ -4,9 +4,10 @@ from sqlalchemy import text
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 
 from app.config import settings
+from app.db.base import Base
 
 engine = create_async_engine(
-    settings.database_url,
+    settings.sqlalchemy_database_url,
     pool_pre_ping=True,
 )
 
@@ -27,3 +28,11 @@ async def get_db() -> AsyncGenerator[AsyncSession, None]:
 async def check_database() -> None:
     async with engine.connect() as conn:
         await conn.execute(text("SELECT 1"))
+
+
+async def init_db_schema() -> None:
+    """创建缺失的表（开发/首次部署；生产可改为 Alembic 迁移）。"""
+    import app.db.models  # noqa: F401 - register ORM tables on Base.metadata
+
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)