Adds a complete bot testing system to the Arbiter Tools tab:
- Fill tournaments with bot players (8-128) with realistic Arabic names and
  bell-curve rating distribution
- Auto-play individual rounds using ELO probability simulation
- Simulate entire tournament with progress bar UI (sequential AJAX)
- Cleanup bots with one click
- Bot players marked with 🤖 badge in players list

New files: BotSimulationService.php, _bot_testing.php, migration 005
Also updates EL3AB_PLAYER_APP_DATA.md with domino/ludo/theme/tournament schemas
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>