wp

[1batu]

This pull request focuses on improving error handling and code robustness throughout the codebase, particularly in database operations and resource management. The main changes ensure that errors are properly checked and handled, default values are set on failure, and resource cleanup is performed safely.

Error handling and robustness improvements:

• Added error checks for all database queries in metrics_handler.go and set default values if queries fail, preventing potential panics and ensuring Prometheus metrics are always returned with valid values. [1] [2]
• Added error handling for the main query in GetActiveStocks in universe_handler.go, setting zero values on failure to avoid returning incomplete or nil data.
• Wrapped the universe update trigger in a goroutine with error logging to prevent unhandled errors from affecting the response.
• Updated transaction rollback in trading_engine.go to safely ignore rollback errors if the transaction was already committed, preventing misleading error logs.

Resource and API usage improvements:

• Used blank identifier (_ = ...) for function calls where errors are intentionally ignored, such as setting deadlines and limiting collectors, to clarify intent and suppress linter warnings. [1] [2] [3] [4]
• Added a nolint directive to the import of a deprecated Twitter package, documenting the reason for continued use and future replacement.