chore(main): release 4.0.0

[scolladon]

🤖 I have created a release beep boop

4.0.0 (2026-09-01)

⚠ BREAKING CHANGES

• pack: select and emit offset deltas from gc, pack-objects and bundle-create (#292)
• tree: compare entry-name bytes on every tree read path (#291)

Features

• pack: select and emit offset deltas from gc, pack-objects and bundle-create (#292) (5d2e435)
• tree: compare entry-name bytes on every tree read path (#291) (5ac0cf0)

Bug Fixes

• adapters: handle broken-pipe errors when writing command stdin (#288) (f83c342)
• reflog: read reflogs leniently and rewrite them byte-faithfully, matching git (#290) (aa4d273)

Performance

• remediate the 2026-08 performance review — reads, walks, checkout, caches, concurrency, gc (#285) (cc80014)

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