Add cross-platform rust-hybrid CI smoke

[jununfly]

This was generated by AI during triage.

Parent

Roadmap node 1-6-5. Add cross-platform CI smoke for migrated Rust indexing path and plan docs/plans/2026-06-29-rust-hybrid-cross-platform-ci-smoke-plan.md.

What to build

Add one cross-platform CI smoke for the migrated rust-hybrid indexing path. The smoke should create a tiny temporary TypeScript fixture, run the built CLI through init, index --engine rust-hybrid, status --json, and doctor --engine rust-hybrid --bundle --last-run, and fail when the path does not prove rust-hybrid indexing or cannot produce a last-run diagnostic bundle.

Keep this as a path-health guardrail, not a semantic parity or release packaging suite.

Acceptance criteria

• Add a local script that creates a tiny fixture and verifies the rust-hybrid init/index/status/doctor --last-run path.
• Add contract coverage proving the existing Linux/macOS/Windows CI matrix runs the smoke.
• The smoke requires CLI command success, rust-hybrid status evidence, non-zero indexed graph evidence, and a usable doctor last-run bundle.
• The smoke does not depend on external repositories, machine-local corpus paths, or indexing the full ZCodeGraph repository.
• Update roadmap closeout and changelog without claiming full migration coverage.

Blocked by

None - can start immediately.

[jununfly]

This was generated by AI during triage.

Closing as implemented. Added a cross-platform rust-hybrid CI smoke that creates a tiny temporary TypeScript fixture, runs the built CLI through init, index --engine rust-hybrid, status --json, and doctor --engine rust-hybrid --bundle --last-run, and verifies rust-hybrid status evidence plus a usable last-run diagnostic bundle.

The smoke is wired into the existing Linux/macOS/Windows rust-packaged-path CI matrix and remains a path-health guardrail only; it does not assert graph parity, semantic parity, release package layout, or full Rust indexing migration completeness.

Verification: npx vitest run __tests__/ci-rust-packaged-path.test.ts __tests__/rust-hybrid-ci-smoke.test.ts __tests__/rust-indexing-roadmap-ownership.test.ts; npm run build; cargo build --package zcodegraph-core; node scripts/rust-hybrid-ci-smoke.mjs; roadmap validate; git diff --check.