* Rename WebSocket message types for better organization
* Improve state handling with dedicated methods like broadcast_state
* Restructure frontend components and remove unused code
- Added `bidding_duration` field to `DraftSessionSettings` model and migration.
- Updated `DraftStateManager` to manage bidding start/end times using session settings.
- Extended WebSocket payloads to include bidding timer data.
- Added `DraftCountdownClock` React component and integrated into admin and participant UIs.
- Created new `DraftDebug` view, template, and front-end component for real-time state debugging.
- Updated utility functions to handle new timer fields in draft state.
- Changed script tags in templates to load with `defer` for non-blocking execution.
