feat: implement comprehensive startup system and fix authentication

Major improvements:
- Created startup orchestration system with health monitoring and graceful shutdown
- Fixed user registration and login with simplified authentication flow
- Rebuilt authentication forms from scratch with direct API integration
- Implemented comprehensive debugging and error handling
- Added Redis fallback functionality for disabled environments
- Fixed CORS configuration for cross-origin frontend requests
- Simplified password validation to 6+ characters (removed complexity requirements)
- Added toast notifications at app level for better UX feedback
- Created comprehensive startup/shutdown scripts with OODA methodology
- Fixed database validation and connection issues
- Implemented TokenService memory fallback when Redis is disabled

Technical details:
- New SimpleLoginForm.tsx and SimpleRegisterForm.tsx components
- Enhanced CORS middleware with additional allowed origins
- Simplified auth validators and removed strict password requirements
- Added extensive logging and diagnostic capabilities
- Fixed authentication middleware token validation
- Implemented graceful Redis error handling throughout the stack
- Created modular startup system with configurable health checks

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/middleware/rateLimit.middleware.js

@@ -75,6 +75,12 @@ const RATE_LIMIT_CONFIG = {
  * @returns {Object|null} Redis store or null if Redis unavailable
  */
 function createRedisStore() {
+  // Check if Redis is disabled first
+  if (process.env.DISABLE_REDIS === 'true') {
+    logger.info('Redis disabled for rate limiting, using memory store');
+    return null;
+  }
+  
   try {
     const redis = getRedisClient();
     if (!redis) {