Residue found during the #793 review (which fixes the FULL-index path). pipeline_incremental.c's extract ctx does not carry excluded_dirs, so on any incremental run with changed files, cbm_parallel_extract → merge_pkg_entries → cbm_pkgmap_scan_repo walks the repo unexcluded — the #792 15-minute walk survives on real incremental reindexes (the reported 0.4s 'incremental no-op' early-outs before extraction, masking it).
Fix shape: thread the pipeline's excluded_dirs into the incremental ctx (same borrow #793 added for the full path). Blocked-by/after: #793.
Residue found during the #793 review (which fixes the FULL-index path). pipeline_incremental.c's extract ctx does not carry excluded_dirs, so on any incremental run with changed files, cbm_parallel_extract → merge_pkg_entries → cbm_pkgmap_scan_repo walks the repo unexcluded — the #792 15-minute walk survives on real incremental reindexes (the reported 0.4s 'incremental no-op' early-outs before extraction, masking it).
Fix shape: thread the pipeline's excluded_dirs into the incremental ctx (same borrow #793 added for the full path). Blocked-by/after: #793.