Rust macro taxonomy smoke, optional repo evidence, and closeout

[jununfly]

This was generated by AI during triage.

What to build

Produce Plan 5 validation evidence for Rust macro taxonomy. Validate a synthetic macro fixture, run mini-redis smoke, include optional macro-rich repo validation only if a local checkout is available, and close out the roadmap node with an explicit no-macro-graph-write statement.

Plan: docs/plans/2026-06-27-rust-language-indexing-plan-5-macro-taxonomy-frontier.md

Roadmap node: 1-4-3-4

Acceptance criteria

• Synthetic macro fixture validates all required taxonomy categories deterministically.
• mini-redis indexes successfully with Rust-owned indexing.
• Evidence records file/node/edge counts, macro taxonomy, deferred signals, and RSS or unavailable reason.
• Optional macro-rich repo validation is included only if a local checkout is available.
• Evidence explicitly states that Plan 5 writes no macro graph nodes or edges.
• Roadmap node 1-4-3 is updated when the slice completes.

Blocked by

• Rust macro syntax taxonomy extraction #582
• Rust macro-affected semantic region guardrail #583
• Rust macro diagnostics profile and result JSON surface #584

[jununfly]

This was generated by AI during triage.

Closing with Plan 5 evidence recorded. Synthetic macro fixture, mini-redis smoke with RSS, and optional async-trait macro-rich smoke are documented; Plan 5 writes no macro graph nodes or edges.

Evidence: docs/benchmarks/2026-06-27-rust-language-indexing-plan-5-evidence.md

Verification: cargo test --package zcodegraph-core, npm run build, targeted rust-hybrid Vitest suite.