Develop labeling module (#25)

* refactor: remove db table management from LS adapter (mv to scripts later); change adapter to use the same MySQL DB as other modules.

* refactor: Rename LS Adapter module to datamate-python

runtime/datamate-python/app/api/project/list.py

@@ -0,0 +1,152 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.ext.asyncio import AsyncSession
+from typing import List
+import math
+
+from app.db.database import get_db
+from app.services.dataset_mapping_service import DatasetMappingService
+from app.schemas.dataset_mapping import DatasetMappingResponse
+from app.schemas.common import StandardResponse, PaginatedData
+from app.core.logging import get_logger
+from . import project_router
+
+logger = get_logger(__name__)
+
+@project_router.get("/mappings/list", response_model=StandardResponse[PaginatedData[DatasetMappingResponse]])
+async def list_mappings(
+    page: int = Query(1, ge=1, description="页码（从1开始）"),
+    page_size: int = Query(20, ge=1, le=100, description="每页记录数"),
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    查询所有映射关系（分页）
+    
+    返回所有有效的数据集映射关系（未被软删除的），支持分页查询
+    """
+    try:
+        service = DatasetMappingService(db)
+        
+        # 计算 skip
+        skip = (page - 1) * page_size
+        
+        logger.info(f"Listing mappings, page={page}, page_size={page_size}")
+        
+        # 获取数据和总数
+        mappings, total = await service.get_all_mappings_with_count(
+            skip=skip, 
+            limit=page_size
+        )
+        
+        # 计算总页数
+        total_pages = math.ceil(total / page_size) if total > 0 else 0
+        
+        # 构造分页响应
+        paginated_data = PaginatedData(
+            page=page,
+            size=page_size,
+            total_elements=total,
+            total_pages=total_pages,
+            content=mappings
+        )
+        
+        logger.info(f"Found {len(mappings)} mappings on page {page}, total: {total}")
+        
+        return StandardResponse(
+            code=200,
+            message="success",
+            data=paginated_data
+        )
+        
+    except Exception as e:
+        logger.error(f"Error listing mappings: {e}")
+        raise HTTPException(status_code=500, detail="Internal server error")
+
+
+@project_router.get("/mappings/{mapping_id}", response_model=StandardResponse[DatasetMappingResponse])
+async def get_mapping(
+    mapping_id: str,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    根据 UUID 查询单个映射关系
+    """
+    try:
+        service = DatasetMappingService(db)
+        
+        logger.info(f"Get mapping: {mapping_id}")
+        
+        mapping = await service.get_mapping_by_uuid(mapping_id)
+        
+        if not mapping:
+            raise HTTPException(
+                status_code=404,
+                detail=f"Mapping not found: {mapping_id}"
+            )
+        
+        logger.info(f"Found mapping: {mapping.mapping_id}")
+        
+        return StandardResponse(
+            code=200,
+            message="success",
+            data=mapping
+        )
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error getting mapping: {e}")
+        raise HTTPException(status_code=500, detail="Internal server error")
+
+
+@project_router.get("/mappings/by-source/{dataset_id}", response_model=StandardResponse[PaginatedData[DatasetMappingResponse]])
+async def get_mappings_by_source(
+    dataset_id: str,
+    page: int = Query(1, ge=1, description="页码（从1开始）"),
+    page_size: int = Query(20, ge=1, le=100, description="每页记录数"),
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    根据源数据集 ID 查询所有映射关系（分页）
+    
+    返回该数据集创建的所有标注项目（不包括已删除的），支持分页查询
+    """
+    try:
+        service = DatasetMappingService(db)
+        
+        # 计算 skip
+        skip = (page - 1) * page_size
+        
+        logger.info(f"Get mappings by source dataset id: {dataset_id}, page={page}, page_size={page_size}")
+        
+        # 获取数据和总数
+        mappings, total = await service.get_mappings_by_source_with_count(
+            dataset_id=dataset_id,
+            skip=skip,
+            limit=page_size
+        )
+        
+        # 计算总页数
+        total_pages = math.ceil(total / page_size) if total > 0 else 0
+        
+        # 构造分页响应
+        paginated_data = PaginatedData(
+            page=page,
+            size=page_size,
+            total_elements=total,
+            total_pages=total_pages,
+            content=mappings
+        )
+        
+        logger.info(f"Found {len(mappings)} mappings on page {page}, total: {total}")
+        
+        return StandardResponse(
+            code=200,
+            message="success",
+            data=paginated_data
+        )
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Error getting mappings: {e}")
+        raise HTTPException(status_code=500, detail="Internal server error")