feat(bots): enable Redis SSO for todo-bot and calendar-bot

- Activate Redis session storage in both bots for cross-bot SSO
- Update SessionHelper to async methods for Redis-backed SessionService
- Fix async/await issues in todo-bot and calendar-bot matrix.service.ts
- Remove unused imports from calendar-api and todo-api services
- Add CALENDAR_BACKEND_URL and MANA_CORE_SERVICE_KEY to .env.development

Note: SessionService methods are now async (Redis-backed). Other bots
need their matrix.service.ts updated to await these async calls.

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

packages/bot-services/src/session/session.module.ts

@@ -1,6 +1,7 @@
 import { Module, DynamicModule, Global } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
-import { SessionService } from './session.service';
+import { SessionService, REDIS_SESSION_PROVIDER } from './session.service';
+import { RedisSessionProvider } from './redis-session.provider';
 import { SessionModuleOptions, SESSION_MODULE_OPTIONS } from './types';
 
 /**
@@ -11,19 +12,31 @@ import { SessionModuleOptions, SESSION_MODULE_OPTIONS } from './types';
  *
  * @example
  * ```typescript
- * // With explicit configuration
+ * // Basic usage (in-memory sessions, per bot)
+ * @Module({
+ *   imports: [SessionModule.forRoot()]
+ * })
+ *
+ * // With Redis for cross-bot SSO
  * @Module({
  *   imports: [
- *     SessionModule.register({
- *       authUrl: 'http://mana-core-auth:3001',
- *       sessionExpiryMs: 7 * 24 * 60 * 60 * 1000 // 7 days
+ *     SessionModule.forRoot({
+ *       storageMode: 'redis',
+ *       redisHost: 'localhost',
+ *       redisPort: 6379,
  *     })
  *   ]
  * })
  *
- * // With ConfigService (reads from auth.url or MANA_CORE_AUTH_URL)
+ * // With Matrix-SSO-Link (automatic login)
  * @Module({
- *   imports: [SessionModule.forRoot()]
+ *   imports: [
+ *     SessionModule.forRoot({
+ *       storageMode: 'redis',
+ *       enableMatrixSsoLink: true,
+ *       serviceKey: process.env.MANA_CORE_SERVICE_KEY,
+ *     })
+ *   ]
  * })
  * ```
  */
@@ -34,29 +47,76 @@ export class SessionModule {
 	 * Register module with explicit options
 	 */
 	static register(options: SessionModuleOptions = {}): DynamicModule {
+		const providers: any[] = [
+			{
+				provide: SESSION_MODULE_OPTIONS,
+				useValue: options,
+			},
+		];
+
+		// Add Redis provider if storage mode is redis
+		if (options.storageMode === 'redis') {
+			providers.push({
+				provide: REDIS_SESSION_PROVIDER,
+				useClass: RedisSessionProvider,
+			});
+		}
+
+		providers.push(SessionService);
+
 		return {
 			module: SessionModule,
 			imports: [ConfigModule],
-			providers: [
-				{
-					provide: SESSION_MODULE_OPTIONS,
-					useValue: options,
-				},
-				SessionService,
-			],
+			providers,
 			exports: [SessionService],
 		};
 	}
 
 	/**
-	 * Register module with ConfigService (reads auth.url or MANA_CORE_AUTH_URL from config)
+	 * Register module with ConfigService
+	 *
+	 * Reads configuration from environment:
+	 * - MANA_CORE_AUTH_URL: Auth service URL
+	 * - REDIS_HOST, REDIS_PORT: Redis for cross-bot SSO
+	 * - MANA_CORE_SERVICE_KEY: For Matrix-SSO-Link
+	 * - SESSION_STORAGE_MODE: 'memory' or 'redis'
 	 */
-	static forRoot(): DynamicModule {
+	static forRoot(options: SessionModuleOptions = {}): DynamicModule {
+		const providers: any[] = [
+			{
+				provide: SESSION_MODULE_OPTIONS,
+				useValue: options,
+			},
+		];
+
+		// Add Redis provider if storage mode is redis
+		if (options.storageMode === 'redis') {
+			providers.push({
+				provide: REDIS_SESSION_PROVIDER,
+				useClass: RedisSessionProvider,
+			});
+		}
+
+		providers.push(SessionService);
+
 		return {
 			module: SessionModule,
 			imports: [ConfigModule],
-			providers: [SessionService],
+			providers,
 			exports: [SessionService],
 		};
 	}
+
+	/**
+	 * Register module with Redis enabled for cross-bot SSO
+	 *
+	 * Convenience method that enables Redis storage and Matrix-SSO-Link.
+	 */
+	static forRootWithRedis(options: Omit<SessionModuleOptions, 'storageMode'> = {}): DynamicModule {
+		return this.forRoot({
+			...options,
+			storageMode: 'redis',
+			enableMatrixSsoLink: options.enableMatrixSsoLink ?? true,
+		});
+	}
 }