♻️ refactor(matrix-bots): remove offline mode, require login for all operations

- Remove local JSON storage from matrix-todo-bot and matrix-calendar-bot
- Delete TodoService, CalendarService and their modules
- Add requireLogin() helper that prompts users to authenticate
- All bot commands now require login before any operation
- Data is always synced with respective backends (todo-backend, calendar-backend)
- Update CLAUDE.md documentation for both bots

BREAKING CHANGE: Bots no longer work without authentication

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/matrix-todo-bot/src/app.module.ts

@@ -3,7 +3,6 @@ import { ConfigModule } from '@nestjs/config';
 import { HealthController, createHealthProvider } from '@manacore/matrix-bot-common';
 import configuration from './config/configuration';
 import { BotModule } from './bot/bot.module';
-import { TodoModule } from './todo/todo.module';
 
 @Module({
 	imports: [
@@ -12,7 +11,6 @@ import { TodoModule } from './todo/todo.module';
 			load: [configuration],
 		}),
 		BotModule,
-		TodoModule,
 	],
 	controllers: [HealthController],
 	providers: [createHealthProvider('matrix-todo-bot')],