feat(tools-core): land the flight_ground Rust slice of #4466

[dieterolson]

39 new files under rust_core/tools-core/src/flight_ground/: bounce, impact, reference and surface runtimes, canonical and strict JSON, the v1 request/result wire, resource limits, result geometry and validation, plus the ground_reference benchmark and the Rust, Python and Node conformance suites.

This slice is genuinely independent — unlike the Python areas it depends on no other slice, which is why it goes now while ui/pyqt6 waits on #4524.

On the WASM files, precisely

It includes wasm.rs, wasm_reference.rs, wasm_request.rs and wasm_result.rs — the kernel side of the Phase 7 parity work still open under #4103.

Worth being exact about what this is not: it lands the crate only. It does not add a Pages deploy workflow, and it does not swap the hand-written TypeScript mirrors. Both belong to #4103 Phase 7, which the handoff explicitly says not to improvise elsewhere. So this does not close Phase 7.

Purely additive against main

src/lib.rs gains pyo3 registrations for PyFlightGroundRequest, PyFlightGroundResult and five py_* entry points. Both it and Cargo.toml are additive — lib.rs is +25/−0, Cargo.toml promotes serde_json from dev-dependencies and registers the new bench.

Neither reverts anything, which is the failure mode every earlier slice in this series had to guard against.

Verification

• cargo check builds clean
• 191 tools-core tests pass across nine binaries
• cargo fmt --check clean
• cargo clippy --all-targets clean
• no Python or TypeScript source changes

Part of epic #4103.

🤖 Generated with Claude Code

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