feat: unified logging module and remove redundant first_run logic

- Add logger.py with TimedRotatingFileHandler (daily rotation, 30-day retention)
- Replace all print() in migrate.py with logging calls
- Add logging to sync.py for sync status tracking
- Refactor watch.py to use logger.py, remove duplicate first_run branch
- All logs now go to logs/app.log consistently
- Add logging config section to config.yaml, add logs/ to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

watch.py

@@ -5,41 +5,16 @@ Watch daemon - periodically syncs LAN Excel files and migrates changed tables to
 import argparse
 import logging
 import os
-import sys
 import time
 
-import yaml
-
+from logger import setup_logger
 from migrate import load_config, get_connection, create_schema, migrate_table
 from sync import sync_all_files, determine_tables_to_migrate
 
-
-def setup_logging(log_file):
-    """Configure logging to both console and file."""
-    logger = logging.getLogger()
-    logger.setLevel(logging.INFO)
-
-    fmt = logging.Formatter(
-        '%(asctime)s [%(levelname)s] %(message)s',
-        datefmt='%Y-%m-%d %H:%M:%S'
-    )
-
-    # Console handler
-    ch = logging.StreamHandler(sys.stdout)
-    ch.setLevel(logging.INFO)
-    ch.setFormatter(fmt)
-    logger.addHandler(ch)
-
-    # File handler
-    fh = logging.FileHandler(log_file, encoding='utf-8')
-    fh.setLevel(logging.INFO)
-    fh.setFormatter(fmt)
-    logger.addHandler(fh)
-
-    return logger
+logger = logging.getLogger('app')
 
 
-def run_once(cfg, logger):
+def run_once(cfg):
     """Execute one sync + migrate cycle."""
     excel_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'Excel')
 
@@ -47,14 +22,6 @@ def run_once(cfg, logger):
     logger.info("开始同步 LAN 文件...")
     sync_results = sync_all_files(cfg, excel_dir)
 
-    for rel_path, (status, error_msg) in sync_results.items():
-        if status == 'error':
-            logger.error(f"  同步失败: {rel_path} - {error_msg}")
-        elif status in ('copied', 'updated'):
-            logger.info(f"  {status}: {rel_path}")
-        else:
-            logger.debug(f"  跳过: {rel_path}")
-
     # 2. Determine which tables need migration
     tables_to_migrate = determine_tables_to_migrate(cfg, sync_results)
 
@@ -78,9 +45,9 @@ def run_once(cfg, logger):
 
             try:
                 rows = migrate_table(cursor, table_cfg, cfg, use_truncate=True)
-                logger.info(f"  迁移完成: {table_name} ({rows:,} 行)")
+                logger.info(f"迁移完成: {table_name} ({rows:,} 行)")
             except Exception as e:
-                logger.error(f"  迁移失败: {table_name} - {e}", exc_info=True)
+                logger.error(f"迁移失败: {table_name} - {e}", exc_info=True)
                 # Rollback any uncommitted transaction for this table
                 try:
                     conn.rollback()
@@ -106,12 +73,18 @@ def main():
                         help='覆盖配置文件中的 check_interval_minutes')
     args = parser.parse_args()
 
-    # Setup logging
-    log_file = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'watch.log')
-    logger = setup_logging(log_file)
-
     # Load config
     cfg = load_config(args.config)
+
+    # Setup logging
+    log_cfg = cfg.get('logging', {})
+    setup_logger(
+        'app',
+        log_dir=log_cfg.get('log_dir'),
+        level=log_cfg.get('level', 'INFO'),
+        max_keep_days=log_cfg.get('max_keep_days', 30),
+    )
+
     interval = args.interval or cfg.get('check_interval_minutes', 30)
 
     logger.info("=" * 50)
@@ -119,58 +92,9 @@ def main():
     logger.info(f"  同步间隔: {interval} 分钟")
     logger.info("=" * 50)
 
-    first_run = True
-
     while True:
         try:
-            if first_run:
-                logger.info("首次运行，强制同步并迁移所有表...")
-                # On first run, force all tables to migrate by marking all files as 'updated'
-                excel_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'Excel')
-                sync_results = sync_all_files(cfg, excel_dir)
-
-                # Log sync results
-                for rel_path, (status, error_msg) in sync_results.items():
-                    if status == 'error':
-                        logger.error(f"  同步失败: {rel_path} - {error_msg}")
-                    else:
-                        logger.info(f"  {status}: {rel_path}")
-
-                # Force all tables to migrate on first run
-                all_tables = {t['table'] for t in cfg['tables']}
-
-                conn = None
-                try:
-                    conn = get_connection(cfg)
-                    cursor = conn.cursor()
-                    create_schema(cursor, cfg['schema'])
-
-                    for table_cfg in cfg['tables']:
-                        table_name = table_cfg['table']
-                        try:
-                            rows = migrate_table(cursor, table_cfg, cfg, use_truncate=True)
-                            logger.info(f"  迁移完成: {table_name} ({rows:,} 行)")
-                        except Exception as e:
-                            logger.error(f"  迁移失败: {table_name} - {e}", exc_info=True)
-                            try:
-                                conn.rollback()
-                            except Exception:
-                                pass
-
-                    cursor.close()
-                except Exception as e:
-                    logger.error(f"数据库连接失败: {e}", exc_info=True)
-                finally:
-                    if conn:
-                        try:
-                            conn.close()
-                        except Exception:
-                            pass
-
-                first_run = False
-            else:
-                run_once(cfg, logger)
-
+            run_once(cfg)
         except Exception as e:
             logger.error(f"运行周期异常: {e}", exc_info=True)