Fixed Bug Server

## Summary
This branch contains several bug fixes and performance improvements, primarily focusing on:
- Database connection management
- MQTT client stability
- Logging optimization
- API enhancements

## Detailed Changes

### Fixed Issues
1. **Database Connection Management**
   - Removed  from user-validate API route to prevent connection pool exhaustion
   - Added proper connection handling in global Prisma setup
   - Reduced logging verbosity in production environments

2. **MQTT Client Improvements**
   - Enhanced MQTT client initialization with proper error handling
   - Added reconnection logic with configurable intervals
   - Implemented cleanup functions to prevent memory leaks
   - Added separate initialization logic for server and client-side code

3. **Logging Optimization**
   - Removed excessive logging in middleware that was causing high CPU usage
   - Configured appropriate log levels for development and production

4. **Component Stability**
   - Added safety checks in text editor component to prevent MQTT operations on the server side
   - Improved MQTT publishing logic with client availability checks

### New Files
-  - Utility functions for safe database operations

### Modified Files
1.
   - Removed problematic  call

2.
   - Configured different logging levels for dev/prod
   - Removed process listeners that were causing disconnections
   - Exported prisma instance separately

3.
   - Removed excessive logging statements

4.
   - Enhanced initialization with error handling
   - Added reconnection and timeout configurations

5.
   - Added proper cleanup functions
   - Improved connection handling

6.
   - Added MQTT client availability checks
   - Prevented server-side MQTT operations

### Performance Improvements
- Reduced database connection overhead
- Optimized MQTT connection handling
- Eliminated unnecessary logging in production
- Better memory management with proper cleanup functions

### No Issue

src/app/api/user-validate/route.ts

@@ -84,7 +84,7 @@ export async function GET(req: Request) {
       },
       { status: 500 }
     );
-  } finally {
-    await prisma.$disconnect();
   }
+  // Removed prisma.$disconnect() from here to prevent connection pool exhaustion
+  // Prisma connections are handled globally and shouldn't be disconnected on each request
 }