docs/ci-and-releases.md documents what happens on a push to main, why Gitea
rather than GitHub (billing-blocked, private repo, and Forgejo ships no hosted
runners), both runners and their prerequisites, the release/manifest layout,
and how to verify a release with the Lane=Live install test.
Its landmine table is the part worth keeping: every row cost a red pipeline —
Node for JS actions, setup-dotnet unmirrored on data.forgejo.org, the
zombie-task timeout caused by run-release-gate.ps1 redirecting child output,
an en-SE runner locale breaking 40 tests on decimal commas, DAT tests missing
their InstalledDat lane tag, parallel-load timing flakes, and the Avalonia
compositor threading failure that must NOT be 'fixed' by de-async-ing the test.
Also records the culture finding: config, parsing and the wire are all
invariant-safe, so US and European installs behave identically; only
diagnostic strings follow the current culture.
Cross-linked from docs/README.md and release-gate.md, which keeps ownership of
the local bounded gate.
