Added new command to resolve caching issue where manual edits to
charts.json were not reflected in the bot without a restart.
Changes:
- Added /chart-manage reload command to ChartManageGroup
- Calls chart_service.reload_charts() to refresh in-memory cache
- Shows success message with chart and category counts
- Requires admin or Help Editor role permissions
- Uses @logged_command decorator for automatic logging
Fixes: Chart updates not appearing until bot restart
Resolves: Permission denied issue with charts.json (ownership fixed separately)
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Co-Authored-By: Claude <noreply@anthropic.com>
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