Adds better logging for failed processes

[bomoko]

This pull request improves error handling and logging for job failures and exception scenarios involving PolydockAppInstance. The main focus is to ensure that errors are consistently logged both in the application logs and directly on the affected PolydockAppInstance for better traceability and debugging.

Enhanced error handling and logging:

• Added a failed() method to the BaseJob class to log job failures, including error messages and stack traces, and to append error logs directly to the related PolydockAppInstance using the logLine method. The handler is designed to never throw exceptions itself, ensuring robust failure logging.
• Updated exception handling in PolydockEngineFunctionCallerTrait so that when exceptions occur during app instance processing, errors are now also logged directly to the PolydockAppInstance using logLine, in addition to the existing logging. This is applied for status flow exceptions, process exceptions, and unknown exceptions, ensuring consistent and detailed error tracking on the instance.

Minor code style improvements:

• Reformatted the constructor in BaseJob for consistency with code style guidelines.