Develop, debug, and structure Python crawlers built with the Feapder framework. Use when the user asks about Feapder/AirSpider/Spider/TaskSpider/BatchSpider development, project scaffolding, parser design (BaseParser/BatchParser), request/response handling, pipelines, settings/configuration, proxy/user pools, de-duplication, logging, scheduling/tasks, or troubleshooting Feapder runtime issues.