fix docker issue

app/main.py

@@ -107,7 +107,7 @@ bot_manager = BotManager()
 async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
     """
     应用生命周期管理：
-    - 启动时：初始化数据目录、验证数据库连接、预热嵌入服务、初始化 BM25 索引
+    - 启动时：初始化数据目录、验证数据库连接、预热嵌入服务
     - 关闭时：释放数据库连接
     """
     _logger = logging.getLogger(__name__)
@@ -126,53 +126,6 @@ async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
     except Exception as exc:
         _logger.warning("嵌入服务预热失败（将在首次使用时重试）: %s", exc)
 
-    # ── 初始化 BM25 索引 ──
-    try:
-        from app.services.search_engine import BM25Index
-        import app.api.v1.images as images_module
-
-        _images_bm25 = BM25Index()
-
-        # 加载数据库中已有的 OCR 记录到索引
-        from app.database import async_session_factory
-        from app.models.base import OCRImage
-        from sqlalchemy import select
-
-        async with async_session_factory() as session:
-            result = await session.execute(
-                select(OCRImage).where(OCRImage.status == "completed")
-            )
-            records = result.scalars().all()
-            for record in records:
-                if record.ocr_text:
-                    index_text = record.ocr_text
-                    if record.tags:
-                        try:
-                            tags = json.loads(record.tags)
-                            if tags:
-                                index_text += "\n" + " ".join(tags)
-                        except Exception:
-                            pass
-                    if record.story_summary:
-                        index_text += "\n" + record.story_summary
-                    _images_bm25.add_document(
-                        doc_id=record.id,
-                        text=index_text,
-                        metadata={
-                            "file_path": record.file_path,
-                            "tags": json.loads(record.tags) if record.tags else [],
-                            "story_summary": record.story_summary or "",
-                            "confidence": record.confidence,
-                            "provider": record.provider,
-                            "created_at": str(record.created_at),
-                        },
-                    )
-
-        images_module.bm25_index = _images_bm25
-        _logger.info("BM25 索引加载完成: %d 条记录", _images_bm25.size)
-    except Exception as exc:
-        _logger.warning("BM25 索引初始化失败: %s", exc)
-
     yield
 
     # ── 关闭 ──