Implement StockCollector to fetch stock master data from KRX
(Korea Exchange) including market cap, EPS, BPS, and dividend info.
Implement SectorCollector to fetch WICS sector classification from
WISEindex. Both collectors use PostgreSQL upsert for efficient updates.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add session validation in __init__ to ensure database session is not None
- Implement transaction rollback handling in complete_job() for exception safety
- Implement transaction rollback handling in fail_job() for exception safety
- Improve exception handling in run() to gracefully handle fail_job failures while preserving original exception
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
