OptionalbranchOptionalincludeIf true (default), include a minimal-layer diff against the
previous entry on the same branch. Diffs make historySidecar.diff(a, b)
cheaper to compute.
OptionalintervalHow often to record a snapshot, ms. Default 60_000.
OptionalsnapshotForwarded to snapshotToIfcx.
Branch to record on. Default 'main'.