Pierre Warnier 4ce4184e38 ci: make the Docker test matrix resilient to registry flakes (#172) (#173) ...

The Test (debian/alpine/fedora) matrix failed four times in a row on
2026-06-10, each on a transient network error (Docker Hub base-image
pull i/o timeout; crates.io download broken pipe) unrelated to the code.

- fail-fast: false so one distro's flake no longer cancels the others.
- Retry 'docker compose build <target>' (the Docker Hub pull) with backoff.
- Pass CARGO_NET_RETRY into the container and set it for runner-native
  jobs so cargo retries crate downloads; real test failures still fail
  fast (no step-level retry around the test run).

No new third-party actions — a shell retry loop keeps the supply-chain
surface unchanged.

Closes #172.

2026-06-10 12:42:33 +02:00

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ci: make the Docker test matrix resilient to registry flakes (#172) (#173)

2026-06-10 12:42:33 +02:00