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…or not
`PUT /{owner}/{repo}` answered 201 for a repository that already existed
whenever this instance held its handle: `Registry::create` returned the
cached handle before the manifest Create PUT. A cold instance answered 409
for the same repository, so the answer depended on which host you hit.
The Create PUT is now the only authority (ROUNDTRIPS §3, "let the
conditional write be the read"): its 412 is AlreadyExists on every
instance, and a warm handle no longer masks a repository deleted by
another host (the create succeeds and replaces the stale handle).
`open_or_create` (auto_create_on_push, import) treats losing the create
race as success and opens the winner's repository — the same-instance
race used to be absorbed by the warm-handle shortcut.
Round trips: create of a new repository 1 → 1 (Create PUT); create of an
existing one 0 (warm) / 1 (cold) → 1 on both; auto-create unchanged, its
lost race adds only the open it needs. Pinned in the sim's
healthy_request_round_trip_budgets and the ROUNDTRIPS table.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
(cherry picked from commit f63c8ca)
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Stacked on #18.
Imports tobi/walgit#101 by @jonasgrosch, unchanged.
Verified on the top of this stack:
cargo clippy --workspace --all-targets -- -D warnings,cargo fmt --check, the crate test suites, and the Azure harness (just test-azure: store contract plus git push, clone, pull and cold restart on Azurite) pass. Known unrelated failures: the runtime stall timing tests ine2e(also intermittent on main) and the web UI asset tests that needpnpm run build.