fix/various fixes

api/app/tasks/chapter_compose_tasks.py

@@ -0,0 +1,43 @@
+"""Celery：story 变更后重组关联章节的 canonical_markdown（物化视图）。"""
+
+from celery import shared_task
+from sqlalchemy import select
+
+from app.core.db import get_sync_db
+from app.core.logging import get_logger
+from app.features.memoir import repo as memoir_repo
+from app.features.memoir.models import Chapter, ChapterStoryLink
+
+logger = get_logger(__name__)
+
+
+@shared_task(bind=True, max_retries=3, default_retry_delay=30)
+def recompose_chapters_for_story(self, story_id: str) -> dict:
+    try:
+        with get_sync_db() as session:
+            stmt = (
+                select(Chapter.id)
+                .join(
+                    ChapterStoryLink,
+                    ChapterStoryLink.chapter_id == Chapter.id,
+                )
+                .where(
+                    ChapterStoryLink.story_id == story_id,
+                    Chapter.markdown_compose_dirty.is_(True),
+                )
+            )
+            ids = list(session.scalars(stmt).all())
+            for cid in ids:
+                memoir_repo.compose_chapter_from_story_links_sync(session, cid)
+            session.commit()
+        logger.info(
+            "recompose_chapters_for_story: story=%s recomposed_chapters=%s",
+            story_id,
+            ids,
+        )
+        return {"story_id": story_id, "recomposed_chapter_ids": ids}
+    except Exception as exc:
+        logger.warning(
+            "recompose_chapters_for_story failed story=%s err=%s", story_id, exc
+        )
+        raise self.retry(exc=exc) from exc