probeMode previously stat'd every walked file, so setup-gbrain gated its
silent bulk ingest on pre-filter counts that the write path would never
ingest (#2394). The attribution decision now lives in ONE shared gate
(sessionIsAttributable — cheap-parse: cwd extraction + memoized
resolveGitRemote, never a full page build) used by BOTH probeMode and
preparePages, so the two stages' post-attribution counts are structurally
identical. ProbeReport gains skipped_unattributed; the probe prints what it
excluded and --include-unattributed restores raw counts. The parity is
pinned at the prepare stage (probe post-attribution == transcripts reaching
import), deliberately NOT == final written.
Re-derived from PR #2612 under the generated-file screening rule; the
shared-gate design and the remote memo are additions from the plan review.
Fixes#2394.
Contributed by @Lockyer228
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
