Design a multi-step Power Automate workflow in a {{tone}} tone for {{target_audience}} in the {{industry}} industry. The scenario is {{scenario}}. Include trigger, data retrieval, conditional router with three branches, processing pipeline, aggregation, and output with notification. Provide tips and rollback plan. Output numbered steps with title, instructions, outcome, and pitfalls. Word limit: 1500. Use plain language. Skip sections if information is unknown.