Add common id (e.g. "RCTab CVR Id") to both audit log and rctab_cvr.csv

Problem Statement

Currently there is not an efficient way to link records in the rctab_cvr.csv with round-by-round tabulation information that gets printed in the audit log. This makes it difficult to cross reference Cast Vote Record (CVR) information (e.g. a voter's candidate rankings) and round-by-round tabulation information (e.g. how a voter's ballot was interpreted by the tabulator in a certain round).

We also want this "RCTab CVR Id" to be consistent between different tabulations when using the same CVRs. This will enable that comparisons of CVRs and their round-by-round interpretation across multiple tabulations (e.g. when verifying and replicating election results; testing PRs; and comparing RCTab versions).

Proposed Solution

We want a common id (e.g. "RCTab CVR Id") that is shared between the audit log and the rctab_cvr.csv. This common "RCTab CVR Id" must be consistent across different tabulations.

Integration Points

The "RCTab CVR Id" should be included in:

1. rctab_cvr.csv output

   • Add as a new column
   • Maintain existing vendor IDs (if any) for backward compatibility

2. RCTab audit log

   • Continue to include identifier (renamed as "RCTab CVR Id") in each log entry related to ballot processing

Success Criteria

• Every CVR has a common unique id (i.e. "RCTab CVR Id") that is printed to the audit log and the rctab_cvr.csv.
• The "RCTab CVR Id" can be used to trace ballot processing through audit logs.
• Records in the audit log can be easily cross referenced with the rctab_cvr.csv.
• When CVRs are tabulated multiple times, each individual cast vote record is assigned the same "RCTab CVR Id".