As discussed in #6752

there are still inconsistencies in implementation patterns across various services. This discussion aims to discuss and unify these coding details to improve code consistency and maintainability.

Tasks

• Implement Debug Trait for all service builders
  • Most service builders include corresponding service config fields. Special attention should be paid to whether sensitive information might be printed in the debug implementation.
• Module and Structure Renaming
  • ServiceAccessor → ServiceBackend (to align the naming conventions of backend module)
  • delete module → deleter module (to align with naming conventions like writer, reader, lister)
• Remove Empty list Operation Implementations
  • Only keep list implementations in services that actually provide this functionality
  • Remove useless list implementations from services that don't support this operation or have not implemented it yet.
• Unify Scheme Usage
  • Prefer direct string-based scheme specification over enum-based approach
  • Remove Scheme enum usage from bindings
  • Remove the Scheme enum
• Create a service implementation guide/template