Initial MVP for QA asset backend

hy_qa_asset_backend/backend/app/api/sessions.py

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+from datetime import date
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app import models, schemas
+from app.database import get_db
+from app.services.task_runner import TaskRunner
+
+router = APIRouter(prefix="/sessions", tags=["sessions"])
+
+
+@router.get("", response_model=list[schemas.FeishuSessionRead])
+def list_sessions(db: Session = Depends(get_db)) -> list[models.FeishuSession]:
+    return db.query(models.FeishuSession).order_by(models.FeishuSession.created_at.desc()).all()
+
+
+@router.get("/{session_id}", response_model=schemas.FeishuSessionRead)
+def get_session(session_id: int, db: Session = Depends(get_db)) -> models.FeishuSession:
+    session = db.get(models.FeishuSession, session_id)
+    if not session:
+        raise HTTPException(status_code=404, detail="场次不存在")
+    return session
+
+
+@router.post("", response_model=schemas.FeishuSessionRead)
+def create_session(payload: schemas.FeishuSessionCreate, db: Session = Depends(get_db)) -> models.FeishuSession:
+    next_id = db.query(models.FeishuSession).count() + 1
+    session = models.FeishuSession(
+        session_code=payload.session_code or f"MANUAL-{next_id:04d}",
+        title=payload.title,
+        date=payload.date or date.today(),
+        teachers=payload.teachers,
+        feishu_doc_url=payload.feishu_doc_url,
+        feishu_record_id=payload.feishu_record_id,
+        source_file_name=payload.source_file_name,
+        source_text=payload.source_text,
+        process_status=models.ProcessStatus.unprocessed,
+    )
+    db.add(session)
+    db.commit()
+    db.refresh(session)
+    return session
+
+
+@router.patch("/{session_id}", response_model=schemas.FeishuSessionRead)
+def update_session(
+    session_id: int, payload: schemas.FeishuSessionUpdate, db: Session = Depends(get_db)
+) -> models.FeishuSession:
+    session = db.get(models.FeishuSession, session_id)
+    if not session:
+        raise HTTPException(status_code=404, detail="场次不存在")
+    for key, value in payload.model_dump(exclude_unset=True).items():
+        setattr(session, key, value)
+    db.commit()
+    db.refresh(session)
+    return session
+
+
+@router.post("/{session_id}/process", response_model=schemas.TaskRunRead)
+async def process_session(session_id: int, db: Session = Depends(get_db)) -> models.TaskRun:
+    runner = TaskRunner()
+    task = await runner.run(db, task_type=models.TaskType.manual_process, session_id=session_id)
+    return task
+
+
+@router.post("/{session_id}/reprocess", response_model=schemas.TaskRunRead)
+async def reprocess_session(session_id: int, db: Session = Depends(get_db)) -> models.TaskRun:
+    runner = TaskRunner()
+    task = await runner.run(db, task_type=models.TaskType.manual_process, session_id=session_id, reprocess=True)
+    return task
+