Set opt-out flag for Rust crates to prevent accidental publishing #415
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Summary & Motivation (Problem vs. Solution)
TL;DR: developers with working cargo credentials may accidentally publish confidential Turnkey code/artifacts without additional chances to abort if cargo publish is run in the wrong context, since crates default to being publishable.
See rust-lang/cargo#6153 for potential impact if
publish = false
is not set.How I Tested These Changes
No functional change outside of cargo expected.
Pre merge check list
There is likely no CHANGELOG.md entry necessary.