org.simocracy.proposalContext

Sidecar associating a hypercerts activity (proposal) with its Simocracy context (a gathering or a Frontier Tower SF floor). Joined by `subject.uri`. Multiple records may exist per subject; precedence: a sidecar in the proposer's PDS (subject's repo DID == sidecar's repo DID) outranks one in any other PDS, and within a tier the latest `createdAt` wins.