refactor: remove Excel migration pipeline; keep Access-only sync

Drop the Excel (.xlsm) production-execution-card pipeline now that the
project only synchronizes Access databases to SQL Server.

- Delete excel_sync_to_sql.py, migration.py, config/field_mappings.py
- Remove Excel-only config symbols (EXCEL_CONFIGS, MIGRATION_TASKS,
  EXECUTION_CARD_FIELDS, CONTRACT_DATA_*, CACHE_DIR, TEMP_DIR,
  EXCEL_SYNC_* settings) from the config package
- Drop now-unused deps from requirements.txt: pandas, sqlalchemy, openpyxl
- Update .env.example, CLAUDE.md, and the uptime_kuma_utils docstring
- Fix the tube-bending workshop Access table mapping in SYNC_MAPPING
  (source table renamed; old name no longer exists)

The three Excel-sourced tables in warehouseOutbound (executionCardData,
contractData, customerProductType) and their data are left untouched.

Co-Authored-By: Claude <noreply@anthropic.com>

config/app_settings.py

@@ -36,96 +36,6 @@ UPTIME_KUMA_CONFIG = {
     'heartbeat_interval': 59  # 心跳间隔(秒)，需要与 Uptime Kuma 设置一致
 }
 
-# Excel 同步服务心跳
-EXCEL_SYNC_UPTIME_KUMA_CONFIG = {
-    'enabled': True,
-    'push_url': os.environ.get('EXCEL_SYNC_UPTIME_KUMA_PUSH_URL', ''),
-    'heartbeat_interval': 59  # 心跳间隔(秒)，需要与 Uptime Kuma 设置一致
-}
-
 # ================= 运行参数 =================
-# 合并原 config.py 和 update_config.py 的配置
 POLL_INTERVAL = 30     # 轮询间隔(秒)
-EXCEL_SYNC_INTERVAL = 600  # Excel 同步周期(秒)，默认 10 分钟
 BATCH_SIZE = 10000    # 批量处理大小
-CACHE_DIR = os.path.join(os.getcwd(), "temp")  # Excel 缓存目录
-TEMP_DIR = os.path.join(os.getcwd(), "temp")           # 临时目录（兼容 migration.py）
-
-# ================= 字段配置 =================
-# 从原 update_config.py (sync_excel_to_sql.py) 抽取
-EXECUTION_CARD_FIELDS = {
-    "合同年份": ("str", 10),
-    "总排号": ("str", 50),
-    "序号": ("int", None),
-    "订单号": ("str", 150),
-    "车间号": ("str", 20),
-    "销售内部号": ("str", 50),
-    "经办人": ("str", 20),
-    "签订日期": ("date", None),
-    "交货日期": ("date", None),
-    "客户名称": ("str", 200),
-    "产品名称": ("str", 200),
-    "客户型号": ("str", 200),
-    "选型型号": ("str", 200),
-    "量程": ("str", 150),
-    "数量": ("int", None),
-    "备注2": ("str", 500),
-    "备注1": ("str", 500),
-    "位号": ("str", 500),
-    "技术参数": ("str", 1000),
-    "车间": ("str", 200),
-    "工令号": ("str", 200),
-    "接单日期": ("date", None),
-    "新参数": ("str", 1000),
-    "基本型号": ("str", 200),
-    "公称外径": ("str", 200),
-    "安装代码": ("str", 200),
-    "设计形式": ("str", 200),
-    "技术安装代码": ("str", 200),
-    "隔膜类型": ("str", 200),
-    "标准": ("str", 100),
-    "隔膜大小": ("str", 200),
-    "隔膜材质": ("str", 200),
-    "膜片": ("str", 200),
-    "膜片材质": ("str", 200),
-    "CRM明细ID号": ("str", 200),
-    "成品物料编码": ("str", 200),
-    "工单号": ("str", 200),
-    "盘号": ("str", 200),
-    "编码": ("str", 200),
-    "型批名称": ("str", 200),
-    "型批型号": ("str", 200),
-    "开票名称": ("str", 200),
-    "开票型号": ("str", 200),
-    "上数据时间": ("date", None),
-    "生产代码1": ("str", 50),
-    "生产代码2": ("str", 50)
-}
-
-CONTRACT_DATA_FIELDS = {
-    "合同年份": ("str", 10),
-    "车间号": ("str", 20),
-    "工令号": ("str", 200),
-    "订单号": ("str", 150),
-    "客户名称": ("str", 200),
-    "产品型号": ("str", 200),
-    "量程": ("str", 150),
-    "数量": ("int", None),
-    "单价": ("int", None),
-    "ID": ("int", None),
-    "位号": ("str", 500)
-}
-
-CONTRACT_DATA_MAPPING = {
-    "合同年份": "合同年份",
-    "车间号": "车间号",
-    "工令号": "工令号",
-    "订单号": "订单号",
-    "客户名称": "客户名称",
-    "产品型号": "选型型号",
-    "量程": "量程",
-    "数量": "数量",
-    "单价": None,
-    "ID": None,
-    "位号": "位号"
-}