Both parsers apply a new@ cutoff to each session's first record timestamp
(prefix read, never mtime; recent keeps its mtime window exactly as
before), the allowlist applies after the attribution gate, and an explicit
--sources/GSTACK_MEMORY_INGEST_SOURCES override never widens either.
Summaries count exclusions by reason, a new@ run with no sessions says so,
pages carry session_started_at, scoped tightening purges staged pages and
their fingerprints, and the stage consent record carries the cutoff and
allowlist hash so a scope change restages.
