优化RSS订阅收集器，增加父目录路径支持以便导入utils模块，改进数据库写入错误日志，更新插入操作以忽略重复记录，并调整错误信息的截断长度以保留重要信息。

utils/mysql_agent.py

@@ -87,7 +87,13 @@ class MySQLAgent:
                 self.log.warning("Windows连接超时，正在重试...")
                 return self._retry_connection()
 
-            self.log.error("连接失败", error=error_msg, exc_info=True)
+            self.log.error("连接失败", 
+                         error=error_msg, 
+                         error_type=type(e).__name__,
+                         host=self.config.get('host'),
+                         port=self.config.get('port'),
+                         database=self.config.get('database'),
+                         exc_info=True)
             raise
 
     def _retry_connection(self, max_retries: int = 3) -> Any | None:
@@ -129,7 +135,12 @@ class MySQLAgent:
             return df
 
         except Exception as e:
-            self.log.error("SQL查询失败", sql=sql, params=params, error=str(e), exc_info=True)
+            self.log.error("SQL查询失败", 
+                         sql=sql, 
+                         params=params, 
+                         error=str(e), 
+                         error_type=type(e).__name__,
+                         exc_info=True)
             raise
         finally:
             if 'engine' in locals():
@@ -309,12 +320,18 @@ class MySQLAgent:
         except Exception as e:
             if conn:
                 conn.rollback()
-            self.log.error(f"表 {table_name} 批量插入失败", error=str(e), exc_info=True)
+            self.log.error(f"表 {table_name} 批量插入失败", 
+                         error=str(e), 
+                         error_type=type(e).__name__,
+                         table_name=table_name,
+                         total_records=len(df) if not df.empty else 0,
+                         exc_info=True)
             # 记录事务回滚时的失败记录
             if failed_records:
                 self.log.error(
                     f"表 {table_name} 事务回滚，已失败的记录",
-                    failed_records=failed_records
+                    failed_records=failed_records,
+                    failed_count=len(failed_records)
                 )
             raise
         finally:
@@ -601,6 +618,7 @@ class MySQLAgent:
                            sql=sql,
                            params=params,
                            error=str(e),
+                           error_type=type(e).__name__,
                            exc_info=True)
             raise