Projects stored historical changes with explicit availability, redaction and omission counts. Requires current workspace logs view permission and retention. Foreign or expired audit entries return 404. Unavailable datasets return 200 with metadata and explicit availability; raw evidence, credentials and request IPs are never returned. Limits: 100 datasets, 256 entries per dataset, 1000 array elements, 128 object fields, 16 nested levels, 10000 value nodes per projection pass, 65536 string characters and 4194304 document characters. Identities use current workspace checks; canonical public identities may survive deletion and do not prove current resource access. Validators cover the complete current projection.