- Fetch leads from Airtable per campaign on yesterday's date before second pass
- Include 'leads' field in MetricasDiarias JSON alongside coste/ingreso/margen
- Add get_leads_by_campaign_on_date() bulk fetch in AirtableClient
- Add backfill_leads_mayo.py one-off script (already executed for days 01-03)
- Fix UnboundLocalError: remove duplicate local timedelta import inside run()
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
