v3.0.12: Discord Bot addon & notification refactor

What's New

• Central Notifier — Plugin-based notification system replaces monolithic messenger
• Discord Bot Integration — Session events flow through Discord Bot addon with rich embeds and emoji RSVP
• Reply-based Voting — Reply to RSVP messages in Discord with "mogu", "da", "ne mogu", "mozda" to vote
• Telegram & Viber — Moved to standalone community addons (install from Browse Store)

Bug Fixes

• Fixed duplicate bot responses on /quest roll after settings restart
• Fixed v.vote → v.status column bug in session reminder queries

Removed

• Communications Center from Guild Settings (replaced by individual addon settings pages)
• Discord/Telegram/Viber integration from core app