Implement db checker and try-except block

[Vinoryz]

This pull request improves the robustness and error handling of the atxDatastore artifact processor in scripts/artifacts/atxDatastore.py. The main focus is to ensure that missing or inaccessible databases are properly logged and handled, preventing unhandled exceptions during execution.

Error handling and logging improvements:

• Added checks to ensure both ATXDataStore and Local databases are present before proceeding, with clear log messages if either is missing.
• Added error handling for database opening and attachment failures, logging specific error messages and safely returning early if issues are encountered.
• Wrapped the SQL query execution in a try-except block to catch and log any exceptions during data retrieval, ensuring the database connection is closed properly on error.
• Added logfunc to the imports to enable logging functionality.

Data processing adjustment:

• Simplified timestamp conversion by removing unnecessary None checks, since the conversion function can handle None values.