Phase 0 of separation-of-concerns refactor:
- Fix BotConfig class name mismatch in bot/__main__.py
(was importing 'Config' but class is 'BotConfig')
- Add missing 'import json' to bot/services/delivery.py
(json.loads was called without import)
- Remove unused PermissionLevel import from bot/cogs/admin.py
- Fix config attribute path: config.comfyui.url (was config.comfyui_url)
Also adds REFACTOR_PRD.md to .gitignore for project planning docs.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>