feat: add persistent chat agent and indexed batch workflows

backend/wisegrade/indexing.py

@@ -0,0 +1,47 @@
+"""Persistent RQ indexing jobs; scoring uses the same parser and file lock."""
+from sqlalchemy import select
+
+from .db import SessionLocal
+from .models import IndexTask, SubmissionFile, now
+from .scoring import parse_submission
+
+
+def run_index_task(task_id: int, *, session_factory=SessionLocal, embedder=None):
+    with session_factory() as db:
+        task = db.get(IndexTask, task_id)
+        if not task or task.status == "completed":
+            return
+        task.status, task.error = "running", ""
+        db.commit()
+        try:
+            if task.kind == "project":
+                file = db.get(SubmissionFile, task.submission_file_id)
+                if not file or file.recognition_status != "recognized":
+                    raise ValueError("材料已取消选择，请重新预览")
+                kwargs = {"embedder": embedder} if embedder else {}
+                parsed = parse_submission(db, file, **kwargs)
+                task.result = {"file_id": file.id, "pages": len(parsed.get("pages", []))}
+            elif task.kind == "course":
+                from .services import ingest_course
+                task.result = ingest_course(task.course_version_id, db)
+                if task.result["errors"]:
+                    raise ValueError("部分课程资料入库失败：" + ", ".join(task.result["errors"]))
+            else:
+                raise ValueError("未知索引任务类型")
+            task.status = "completed"
+        except Exception as exc:
+            task.status, task.error = "failed", str(exc)[:1000]
+        task.updated_at = now()
+        db.commit()
+
+
+def create_course_index_task(db, course_version_id: int):
+    from .services import enqueue_index_task
+    existing = db.scalar(select(IndexTask).where(IndexTask.course_version_id == course_version_id,
+        IndexTask.kind == "course", IndexTask.status.in_(["queued", "running"])).order_by(IndexTask.id.desc()))
+    task = existing or IndexTask(course_version_id=course_version_id, kind="course", status="queued")
+    if not existing:
+        db.add(task)
+        db.commit()
+    enqueue_index_task(db, task.id)
+    return task