fix: restore Linux and release checks

[wiiiimm (wiiiimm)]

Summary

• gate macOS-only Rust imports and filter protocol types so strict Linux Clippy succeeds
• give both Cargo workspace members concrete versions so Release Please can update them
• remove the now-unused inherited workspace version

Failed runs addressed

• CI: https://github.com/stealth-factory/traffic-ctrl/actions/runs/33346333020
• Release: https://github.com/stealth-factory/traffic-ctrl/actions/runs/33346333022

Validation

• cargo fmt --all -- --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo test --workspace
• cargo build --release --workspace --locked

Linear: https://linear.app/stealth-company/issue/SWR-473/complete-the-cross-platform-rust-core-and-tui-migration

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