Owner decisions recorded: the archive destination stays a directory/UNC
(no object-storage client; share + permissions named at enablement),
parquet-tools-only reading (no re-import), unsigned like the chain (#107).
AuditLog:Archive:RetentionDays (default 0 = never delete; else must exceed
AuditLog:RetentionDays, counted from the archived month's end) and
DeleteSupersededStaleArchives (default true) run after every purge tick.
A retried purge's stale Archived archive is deleted only when a later,
verifying, Purged archive of the same partition provably holds every row:
same prior anchor and the stale chain-end hash at its chain-end sequence
(row or tombstone), every unchained row present by EventId; otherwise it is
reported KeptStale. A sole copy left at Archived is never touched. Deletion
removes only the archive name's own three files in its folder, manifest
first, never a manifest-supplied path. `audit archive cleanup [--dry-run]`
= CleanupAuditArchives (Administrator).
AuditLogArchiveCleanupTests (MSSQL) cover retried purge, kept stale copy,
sole copy, retention and the path guard; each safety rule mutation-checked.
Follow-ups filed: #113, #114, #115.
Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV
GET /api/audit/export?format=parquet returned 501. It now streams the same 24
columns as csv/jsonl (AuditExportRow, CsvHeader order) as one Parquet file,
one 10,000-row row group at a time. Each row group is encoded into a small
non-seekable staging buffer and copied to the response asynchronously, because
Kestrel rejects the synchronous writes the Parquet writer issues.
New management commands, with CLI parity:
- ListAuditArchives -> `audit archive list` (AuditArchiveListResult: enabled
flag + every manifest).
- VerifyAuditArchive(Name) -> `audit archive verify --name` (files, chain,
purge anchor); exit 0 verified, 3 not verified, 1 error, 2 unauthorized.
Both carry verify-chain's gate: OperationalAudit roles (Administrator, Viewer),
site-scoped non-Administrator refused because an archive spans every site.
VerifyAuditArchive uses the long-running Ask timeout. Error codes
ARCHIVE_NOT_CONFIGURED, INVALID_ARGUMENT, NOT_FOUND.
RequiredRoleMatrixTests freezes both gates; ManagementSurfaceParityTests now
probes `audit archive list|verify` alongside `audit verify-chain`.
Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV
Joseph Doherty