v0.7.1 — Security audit + package cleanup

Security\n- Removed launch scripts containing local paths from published crate\n- Excluded ROADMAP.md from crates.io package\n- Added Cargo.toml exclude globs for dev-only scripts\n\n### Changed\n- v0.7.0 → v0.7.1 (package-level fix only, no code changes)\n\nFull v0.7.0 features: cost routing, sparrow import, self-improving engine, REFLEXION-MAX PROTOCOL V2