feat(storage): add comprehensive tests for StorageManager with memory, filesystem, and custom function backends

feat(email): implement EmailSendJob class for robust email delivery with retry logic and MX record resolution

feat(mail): restructure mail module exports for simplified access to core and delivery functionalities

ts/security/index.ts

@@ -1,33 +0,0 @@
-/**
- * Security module stub
- * Security logging and IP reputation checking
- */
-
-export enum SecurityLogLevel {
-  DEBUG = 'debug',
-  INFO = 'info',
-  WARNING = 'warning',
-  ERROR = 'error',
-  CRITICAL = 'critical',
-}
-
-export enum SecurityEventType {
-  AUTH_SUCCESS = 'auth_success',
-  AUTH_FAILURE = 'auth_failure',
-  RATE_LIMIT = 'rate_limit',
-  SPAM_DETECTED = 'spam_detected',
-  MALWARE_DETECTED = 'malware_detected',
-}
-
-export class SecurityLogger {
-  log(level: SecurityLogLevel, eventType: SecurityEventType, message: string, metadata?: any): void {
-    console.log(`[SECURITY] [${level}] [${eventType}] ${message}`, metadata || '');
-  }
-}
-
-export class IPReputationChecker {
-  async checkReputation(ip: string): Promise<{ safe: boolean; score: number }> {
-    // Stub: always return safe
-    return { safe: true, score: 100 };
-  }
-}