Remove redundant sba_current_season and pd_current_season config values.
All code now uses sba_season and pd_season, which properly read from
environment variables. Fixes /team command defaulting to Season 12.
- Remove duplicate *_current_season constants from config.py
- Update 100+ references across commands, services, and utils
- sba_season defaults to 13, pd_season defaults to 10
- Environment variables SBA_SEASON/PD_SEASON now work correctly
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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