- Add scripts/check_pipeline.py: read-only diagnostic for pricing pipeline
row counts, date range analysis, HAVING filter impact, join coverage
- Add description field to all 12 workflows in workflows.toml
- Parse and display descriptions on extraction status cards
- Show spinner + "Running" state with blue-tinted card border
- Display start time with "running..." text for active extractions
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>