release: publish the embeddable Rust crate as 0.7.0

[ZhiXiao-Lin]

Summary

• version the Rust crate as 0.7.0 and document inline wire inspection plus the stable risk taxonomy
• publish a3s-sentry to crates.io from tagged releases
• keep the root and SDK lockfiles aligned
• fix stable-toolchain Clippy and rustdoc warnings discovered by the release gates

Why

A3S Gateway now embeds Sentry::inspect_wire, but a path-only unpublished dependency makes cargo package and the Gateway crates.io release fail. Publishing 0.7.0 provides the registry dependency needed by the Gateway 1.0.12 Cloud route fix tracked in A3S-Lab/Gateway#9.

Validation

• cargo fmt --all -- --check
• cargo clippy --locked --all-targets -- -D warnings
• cargo test --locked --all --no-run
• RUSTDOCFLAGS="-D warnings" cargo doc --locked --no-deps
• cargo package --locked --allow-dirty --offline
• cargo publish --locked --dry-run --allow-dirty
• YAML parse and git diff --check

The repository CI remains responsible for executing the full test suite on the PR.