autogreylist: Removes zcd, was, and meets greylist criteria from getautogreylist history

[jamescowens]

This commit removes the reporting of zcd, was, and meets autogreylist criteria from the autogreylist history of each project. These are confusing because the historical records are reconstructed from the present SB backwards in time, and therefore the zcd, was and meets are NOT the same as what they would have been if one were standing on a particular historical superblock and computing the present status. Essentially the final value at the last history record (going backwards) IS correct and represents the current status.

The superblocks_from_baseline and total_credit remain as these are not misleading, and allows someone to script an audit based on the historical information.

[Copilot]

Pull Request Overview

This PR removes the reporting of zcd, was, and meets_greylisting_criteria from each project’s autogreylist history, preserving only superblocks_from_baseline and total_credit.

• Strips obsolete fields from the JSON response in getautogreylist RPC
• Simplifies UpdateHistoryEntry to include only baseline index and total credit
• Removes related members, parameters, and constructor overloads in AutoGreylist

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/rpc/blockchain.cpp	Deleted JSON pushKV calls for zcd, was, and meets_greylisting_criteria
src/gridcoin/project.h	Updated UpdateHistoryEntry struct and constructor to drop those fields

Comments suppressed due to low confidence (2)

src/rpc/blockchain.cpp:2824

• Update the RPC help documentation for getautogreylist to remove references to the now-removed zcd, was, and meets_greylisting_criteria fields so the help text matches the actual output.

                    historical_entry.pushKV("total_credit", "NA");

src/rpc/blockchain.cpp:2827

• Add or update unit/integration tests to verify that getautogreylist no longer includes zcd, was, or meets_greylisting_criteria in its history entries.

                entry_history.push_back(historical_entry);