apps/bootstrap-installer/.gitignore excludes src-tauri/Cargo.lock — a
create-tauri-app scaffold default nobody revisited. With nothing tracked,
`--locked` fails outright ("cannot create the lock file ... because
--locked was passed") and the cache key hashed an absent file.
Keyed on Cargo.toml instead. The underlying gap — a signed installer that
re-resolves its whole dependency graph on every build, in a repo whose
pinning policy is otherwise strict — is noted in the workflow and left
for its own change rather than widening this one.
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