[PATCH 0/2] ci: reduce pressure from large test fixtures

Linux pull-request jobs with the long tests enabled hit two resource problems: diff was killed after git log produced its huge output, and large clone and repack tests hit ENOSPC.

The first patch compares the huge output with cmp and removes the large files after success. The second sizes Make and prove parallelism to the Linux runner's available CPUs, following the existing GitLab policy. Both changes keep the large test cases enabled.

Prepared with Codex, including review by a separate Codex agent.

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
Tamir Duberstein (2):
      t4205: compare huge output without diff
      ci: match Linux jobs to available CPUs

 ci/lib.sh                     | 4 ++++
 t/t4205-log-pretty-formats.sh | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

--- base-commit: 3bc0341126508f78f5869cbfc0005e987efdf0c7 change-id: 20260923-ci-large-test-resources-349cdc95f7f8