org.simocracy.ballot

One sim's elicited ballot in a funding-mechanism run (S-Process, Quadratic Voting, …). Ballots are the public, replayable elicitation layer of a run: anyone can recompute the outcome by feeding a run's ballots through the mechanism's deterministic aggregator. The `payload` union carries the mechanism-specific ballot shape; new mechanisms extend the union without breaking existing readers. Written by the run initiator; the sim that cast the ballot is attributed via `simUri`. Fixed-point convention: fields ending in `Milli` store real numbers ×1000 (lexicons have no float type).