HIP-513 Smart Contract Traceability Extension

[mgarbs]

From the Motivation:

Enabling mirror nodes to download traceability info only if they need or want to process it.
Enabling full replay of smart contract service transactions will improve the usability, auditability, and debuggability of smart contract service transactions. Current facilities are insufficient to inspect “internal” transactions executed across contracts, and provide insufficient error messages when correcting errors during smart contract development.
Enabling estimations like gas to be consumed.

Opening up the broader discussion of hip-513 Smart Contract Traceability Extension.