Do not compute hash for logging in RPC

[georgeee]

Do not compute scan state hash to perform a debug log in an RPC.

Use an available staged ledger hash value.

Explain how you tested your changes:

• No specific tests we just move debug logging from one place to another

Checklist:

• Dependency versions are unchanged
  • Notify Velocity team if dependencies must change in CI
• Modified the current draft of release notes with details on what is completed or incomplete within this project
• Document code purpose, how to use it
  • Mention expected invariants, implicit constraints
• Tests were added for the new behavior
  • Document test purpose, significance of failures
  • Test names should reflect their purpose
• All tests pass (CI will check this if you didn't)
• Serialized types are in stable-versioned modules
• Does this close issues? None