Feature/fix update instace

[kevin-mindverse]

Refactor and improve instance credential management

Description

Refactored the instance credential management system to improve security, reliability, and maintainability. The current implementation had several issues related to load record management and credential updating.

Changes implemented

1. Renamed update_instance_id method to update_instance_credentials to better reflect its purpose of updating both instance ID and password.
2. Enhanced error handling to properly validate and report issues during credential updates.
3. Modified the implementation to properly fetch the current load record instead of using a simplistic query that could lead to incorrect record updates.
4. Ensured consistent parameter handling for both instance ID and password.
5. Updated all references to the renamed method across the codebase.

Technical Details

• Fixed potentially incorrect load record selection in credential update logic by using the proper get_current_load() method
• Improved logging by masking sensitive password information
• Added more descriptive error messages to aid in troubleshooting
• Ensuring data consistency by verifying record existence at multiple steps

Affected Components

• LoadService (load_service.py)
• Upload API (routes.py)