Improve Error Handling Throughout Codebase

[viperman1271]

Description

The current error handling in the codebase is insufficient for a production environment. Many functions lack proper error handling, and errors are often silently ignored or only printed to stderr without appropriate recovery mechanisms.

Current Issues

• Many functions return void instead of error codes or exceptions
• Error conditions are often not checked
• Exceptions are caught but only printed to stderr without proper recovery
• No consistent error handling strategy across the codebase
• No error reporting mechanism for monitoring
• No retry mechanisms for transient failures

Impact on Production Readiness

Poor error handling can lead to:

• Silent failures that are difficult to diagnose
• Cascading failures when one component fails
• Inability to recover from transient issues
• Difficulty in monitoring application health
• Potential security vulnerabilities

Specific Examples

1. In Mongo::IsConnected(), exceptions are caught and printed to stderr, but there's no retry mechanism
2. In NetWatchdogServer::Run(), there's no error handling for socket binding failures
3. In WebServer::Run(), database connection failures are detected but there's no retry mechanism

Suggested Solution

• Implement a consistent error handling strategy across the codebase
• Return appropriate error codes or use exceptions consistently
• Add retry mechanisms with exponential backoff for transient failures
• Implement circuit breakers for external dependencies
• Add proper error logging with context information
• Create error reporting mechanisms for monitoring
• Add unit tests for error conditions